After checking out these very detailed screen caps (thanks by the way) I believe it is Megatron clocking Prime's mouthguard off in the scene in the grassy background.
I took for granted that it was the audi tf who ripped through the buildning but this snapshot shows it's Bumblebee. One can clearly see that's BB, the color, the chin.
Is it possible Prime, Bumblebee and possibly Arcee (since it looks like she is chasing the Audi bot down a street in China) are all over there together on some sort of mission? Makes some bit of sense, but its tough to tell if that's just the lighting making the car look like Bumblebee since the very next scene shows the car coming through the other side of the wall.
Things I've noticed with these screen caps *While scorpinok jumps at "jetfire", there are a couple of people hiding behind behind a wall. They do not seem worried about being exposed to "jetfire". *It seems megatron kicks prime in the face, pieces of prime's blue cheeks are stuck on megatron's feet/threads. *Sam, Mikaela, Lennox, and Epps are all present during the fallen teleport/flame clip. *There are a few people on the planes in the clips where the protoforms crash down on the battle ships. *Just for fun: there's a bird in a cage in the scene that the Audi-bot crashes through the apartment with the two guys. The bird is fake.
