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File this under billionaire bitchfest -- Mark Zuckerberg going off on Elon Musk's company, SpaceX, for the epic failure of a rocket launch.

Musk's SpaceX Falcon 9 rocket exploded Thursday morning in Florida during testing. The blast obliterated a Facebook satellite that was on board, and meant to offer connectivity to much of Africa.

Zuck ain't happy and threw some low-key shade Musk's way shortly after the payload went boom.

Amy Schumer is appalled her friend and fellow comedian, Kurt Metzger, chose to defend someone accused of rape ... by mocking rape victims.

Amy went public Wednesday, saying she was saddened and disappointed at Metzger's sarcastic and profanity-laced posts ... in which he blamed "internet feminists ... for not constantly urging everyone to go to cops FIRST."

Metzger's pissed about allegations another comedian, Aaron Glaser, raped several women in NYC -- and he claims the alleged victims didn't go to police. He went on to urge feminists to "Pull your heads out of your c**** and your c**** out of your blogs, and try actually helping victims."

The PR nightmare for Amy is Metzger has appeared on her Comedy Central show multiple times. She calls him a "great writer," but denies reports he writes for her show ... despite his IMDB credits.

Most importantly, Amy added she "couldn't be more against [Metzger's] recent actions."

We reached out to Comedy Central, so far no word back.

The son of NBA legend Moses Malone told cops the men who attacked and robbed him at gunpoint outside of a Houston strip club were looking to "punish" him for disrespecting James Harden in a Facebook post.

TMZ Sports has learned ... the D.A. has charged 4 men for the June 25th incident -- in which Moses Malone Jr. says he was pulling up to V Live when he was rushed by a group of guys who threatened him over the Facebook post. Malone claims he was beaten down, someone snatched his $50k chain and at least one person in the group flashed a 9mm handgun.

Malone told cops one of the alleged assailants -- Darian Blount -- is a bouncer at V Live ... and Harden is a "prominent customer at the location."

Malone told cops the men were upset that Moses had gone to Facebook to publicly criticize the cost of Harden's youth basketball camp in the days before the incident.

According to the criminal complaint, obtained by TMZ Sports, Malone told cops ... Blount said, "he had disrespected James Harden and that he need to be punished after that."

Blount and the 3 other men have each been charged with aggravated robbery with a deadly weapon.

Prince Harry showed the world ... staying sexually safe and responsible is super easy.

Harry took an HIV/AIDS test in front of the cameras, to show the world -- and especially the thousands of people in the UK who have the virus but don't know it -- it's as easy as sitting down and getting results just minutes later.

The test is nothing more than a pin prick. In Harry's case ... he's negative.

Harry's making HIV/AIDS part of his royal agenda ... something his mom did as well.

Facebook is square in the middle of a shooting for the 2nd time in a week -- this time the victims are 3 men in Virginia who were chilling in a car when the shots were fired.

The incident went down in Norfolk on Tuesday while the men were listening to music, singing along to Lil Bibby's "Word Around Town" and smoking. They were also on Facebook Live when, without warning, a spray of bullets begins -- more than 20 shots fired.

The video is chilling and the camera remained on throughout the incident. Once the shots stop, you hear what appears to be a bystander telling them to stay awake and hold on for an ambulance.

All 3 were hospitalized and police say one of them has life-threatening injuries. So far no suspects, but police are aware of the FB vid and hope it can reveal any clues.

Exactly a week ago ... when Philando Castile was shot and killed by a police officer, his girlfriend used FB Live to stream the aftermath.

Public Enemy's Professor Griff is shutting down rumors he and Dallas shooter Micah Johnson were pals ... saying a photo of the two shaking hands was only a one time thing.

Social media exploded with the image Friday after the pic was uncovered on Johnson's Facebook page. Griff tells TMZ he never knew Johnson personally and was shocked to see his own face pop up following the shooting.

Griff says he's been bombarded with vociemails and other messages from people threatening to kill him and his family since the pic surfaced.

And get this ... Griff tells us shortly after the image came up, he was contacted by his local cops for an interview. Griff says once he told the cops he only had the one chance encounter with Johnson, they let him off the hook.

Micah Xavier Johnson -- the 25-year-old law enforcement confirms as the Dallas shooter -- had involvement with a handful of pro-black and police watchdog groups.

Johnson's social media accounts reveal he was a member of several Black Panther organizations, including The New Black Panther Party Houston Chapter.

Johnson also subscribed to a Facebook group called "The Black Matrix," which aims to dismantle the system it believes "white societal elites" have put in place to "control the perceptions of its Black populations."

Johnson -- who served in the U.S. Army -- had involvement with Facebook communities including "Filming Cops" and "Police The Police," which describes itself as a platform for documenting and archiving police misconduct, brutality and abuse of authority.

Dallas PD Chief David Brown said before they took down Johnson he said he was angry about police brutality and wanted to kill white officers.

A woman trained a camera on her boyfriend as he succumbed to multiple wounds after being shot by a cop.

Philando Castile was driving with Lavish Reynolds in Falcon Heights, Minnesota Wednesday when his car was pulled over ... she says for a broken taillight.

The video starts just after the shooting, but according to Reynolds, the officer asked Castile for his license and registration. She says Castile told the cop he had a pistol on him that was registered, and when he reached for his wallet the officer warned him to stop. Reynolds says Castile actually put his hands back up, but the cop shot him 4 or 5 times.

Castile died after being taken to a local hospital.

The cop says on video, "I told him not to reach for it. I told him to get his hand out."

Sinead O'Connor is alive and seemingly well after Chicago police responded to a call she was threatening to jump off a bridge.

Chicago PD tried to track down O'Connor Thursday evening when O'Connor's family contacted Irish police, saying she threatened suicide.

But O'Connor is claiming cops made it all up and she never threatened to jump, saying, "some stupid bitch at Swords Garda station [Irish police] decided she'd like to throw a bit of false and malicious gossip."

Irish police told us they have no comment on Sinead's accusation.

Twitter, Google and Facebook vigorously eradicate accounts created by terrorists networks ... the tech giants say in response to a lawsuit claiming they enable ISIS' terrorist activities.

TMZ broke the story ... a victim's father is holding the tech companies responsible for fueling the Paris attacks back in November, claiming the social networks make it easy to maintain accounts that promote ISIS' extremist propaganda.

A spokesperson for Twitter tells TMZ ... the lawsuit is without merit, adding they condemn acts of violence for which ISIS claims credit and actively work to eliminate any presence promoting terrorism.

Google tells us through a spokesperson, YouTube (which they own) terminates flagged accounts run by terrorist organizations. They declined further comment on the lawsuit.

Twitter, Google and Facebook are responsible for the Paris attacks because they let ISIS spread extremist propaganda and recruit on their social networks ... so says a victim's father in a new suit.

According to legal docs obtained by TMZ, Reynaldo Gonzalez is suing the social media giants for enabling ISIS to explode into the most feared terrorist group in the world.

Reynaldo's daughter, Nohemi, was one of the 130 victims killed in coordinated attacks last November fueled by ISIS' ability to easily create and maintain accounts ... including on YouTube (owned by Google).

The family claims the social networks were negligent by allowing ISIS to post beheading videos. What's more ... the suit claims the tech giants raked in profits from ad placements in ISIS postings.

Reynaldo -- whose daughter was the lone American killed in the attacks -- says the social sites failed to take action despite outcry from the U.S. government.

Richard Simmons just silenced everyone speculating he's been hiding from the public during a gender transition ... calling the reports lies and focusing attention on the Orlando tragedy.

Simmons addressed the rumors, saying, "Although I am not transitioning, I have and always will be supportive of those who are going through their journey." He continues, "My broken heart and healing thoughts are with the people of Orlando and all other victims of prejudice, bigotry and hate."

Sinead O'Connor's been forced out of her native Ireland by her father, ex-husband and ungrateful son ... if you buy what she's selling in a rambling angry letter about her suicide attempts.

Sinead blames her ex, John Reynolds, and son Jake for forcing her to "run to another continent just to stay alive." As we've reported, she's now living outside Chicago, and disappeared for 24 hours ... leading friends and family to think she was going to kill herself.

She acknowledges having a "suicidal compulsion" and says to the men in her family ... "Every one of you had better pray I die. Because I'm suing the f****** lot of you for what you've done to me if I manage to live through it."

In her Facebook post the singer also rants about abortions, her mother's death, her "psychological destruction" and a mountain of medical bills.

Sinead vows that if God doesn't kill her ... "We are all going to court and we are gonna have this out in full public for once and for all."

Sinead O'Connor is blaming Prince's drug problems on his good friend, Arsenio Hall -- but he says the Irish singer is totally full of it.

Sinead went on the attack, saying ... "Two words for the DEA investigating where (sic) prince got his drugs over the decades ... Arsenio Hall (AKA Prince's and Eddie Murphy's bitch)."

She went on to say on her Facebook page ... she's actually reported Arsenio to the Carver County Sheriff's department, which is investigating Prince's death.

A rep for Arsenio says Sinead's claim is "absolutely false, ridiculous and absurd."

She can thank Prince for writing her biggest hit, "Nothing Compares 2 U" -- but fact is, Sinead was NOT close to Prince ... and she's made other outrageous claims about him. She once alleged he punched her and held her against her will at Paisley Park.

The Kardashians live and breathe on social media ... but in the 12 hours plus since Rob and Blac Chyna's engagement not a single tweet, Instagram post or Facebook update about the news.

Zilch.

Snapchat? Nada.

They've all been on social media posting but have made no mention of the engagement.

For a family that thrives on the millions of followers, they've not congratulated the family's only son and brother.

The 4-month old infant who was famously known as the "Bernie Baby" on social media ... has died from Sudden Infant Death Syndrome.

Oliver Jack Carter Lomas-Davis's mother Souxsie says her son died on February 25. She made the sad announcement on Facebook.

Oliver became a phenom when his mom dressed him up in a wig and glasses to look like Sen. Bernie Sanders and posted the pic online.

The senator actually got to meet his youngest (we're guessing) supporter a few weeks ago during a rally in Las Vegas.