Umm ... did Zac Efron just get into another fight with a homeless man?!

Not exactly!

To a casual observer, it may appear that the unruly actor is punching out a crew of dudes in perhaps a drug-fueled rage -- but, like much in Hollywood, appearances can be deceiving.

The 17 Again star was filming a fight scene for his new movie, We are Your Friends, on Tuesday afternoon in Los Angeles, when photogs caught the actor amid an on-set scuffle.

Efron, who is bruised and bloody in the pics, looks like his face took some heat in the faux fight.

We are a little disappointed that it's only a movie fight! We were kind of hoping Efron pissed off the wrong band of homeless men and his wild antics finally landed him a black eye. But at least we have something to look forward to from the pretty party boy ...

We Are Your Friends is a film about an up-and-coming DJ, who is busy juggling life and love in LA, while trying aspiring to achieve mainstream success.