Funny, that's the same thing I ask myself four minutes into most summer blockbusters.

Mizerock, I'm assuming Hawkeye getting ready to shoot an arrow into the back of Captain America's head was simply a mistake. However, Hawkeye originally did start out as villain, one of Iron Man's best, imo. Then Iron Man suggested that Hawkeye would make a good member of the Avengers, Hawkeye redeems himself, etc. So…