Orlando Bloom Attacks Photographer!

Orlando Bloom was NOT in the mood yesterday as photographers snapped him arriving home on his motorcycle.

Orly jumped off his bike, immediately began yelling at a couple of the guys and even ducked into one shooter's car ... to grab some equipment maybe? It wasn't clear what he was doing but when he got in in a photographer's face and reached for his lens, it was pretty obvious he was trying to get that guy outta there!

Our photographer watching from the side tells us: "Orlando was super pissed. He has his moments -- he just gets upset sometimes and doesn't want photographers around. No one was doing anything other than standing on the side of the road taking pictures, but he just didn't want it that day."

Obviously the paps are staked out trying to catch a glimpse of Orlando's pregnant fiancee Miranda Kerr, who's due next month.

Hey, everyone's allowed to be in a bad mood sometimes but Orly, relax, we love you!