Michael Keaton -- Bat-Kid is AWESOME!

Batkid is about to bat-crap his shorts ... 'cause he just got props for his romp through San Francisco yesterday from BATMAN HIMSELF!!!

Michael Keaton was cruising out of a Beverly Hills restaurant Friday when we asked about Batkid -- the 5-year old who celebrated the end of his battle with leukemia yesterday by running around SF acting like the Dark Knight.

Keaton hadn't actually seen the awesome footage of B.K. battling the Riddler or Penguin .... but thought it was one of the coolest things he'd ever heard.

Check out the gallery for a recap of Batkid's epic adventure.