Arnold goes to the gay bar to solicit the help of the guy he saved at the beginning of the movie. The guy is wearing a white shirt and a vest black/gold lamay. During their conversation he takes off the vest, then it cuts to another bartender. When it cuts back the guy has the vest on, another shot and the vest is off again.
A projectile hitting the air at near the speed of light" (about 334,800,000 MPH) would instantly vaporise in a huge, blinding flash from the ridiculously intense frictional heating that would occur at such an enormous velocity in the atmosphere. The energy released would probably kill the shooter and anyone standing anywhere near him. Makes for a good movie effect though.