Continuity mistake: At the hospital while Kick-Ass is talking to his father the oreos move from the tray to the end table without anyone touching them.
Continuity mistake: Kick-Ass gets stabbed and falls down right by the spaghetti sign on the wall behind him, but suddenly in the next shot, he stands up, and is about 30 feet away from the sign.
Continuity mistake: When Kick-Ass is stabbed in the abs by the bullies the sun changes between shots.
Other mistake: The first time Kick-Ass tries to stop a crime, when he gets stabbed in the belly and run over by a car, the stick he's carrying is too big to have fitted in his backpack or in his clothing. He could not have been carrying it.
Continuity mistake: After Dave gets stabbed and hit by the car he has several wounds on his face, but when he talks with his father in the hospital those wounds are gone.
Suggested correction: He talks with his father after several surgeries and long long recovery, that took at least several months. Of course, wounds are gone by this time.
