Justin Bieber -- SICK HOCKEY GOAL ... Seriously, It's Impressive

Say what you will about Justin Bieber ... the dude can play hockey.

Bieber hit the ice at the L.A. Kings Valley Ice Center and scored a goal that featured some impressive skating, impressive puck handling and an impressive shot at the end.

Honestly, it's pretty damn good ... and Bieber knew it -- 'cause afterward he tweeted, "My dangles were unreal ... did u see that shot? I'm number 20. #dangles #20 #iceicebaby #uthoughtthiswasagame #imadethatpuckmybitch."

Bieber's not just a hockey fanatic -- he's also into basketball, skating and now he's boxing with Floyd Mayweather.

In fact, boxing champ Andre Berto says he's worked with Bieber and says the guy is "crazy athletic."