Yes, I know that those scenes of people flying after getting shot are just movie stuff. I have watched almost every episode of Mythbusters too, it's one of my favorite shows. In one episode they were trying to determine whether it was possible to disarm a person by shooting at the gun in his/her hand, and then Jaime calculated that a bullet's kinetic energy is similar to that of a good blow from a baseball bat. The bullet's impact against armor or a bulletproof vest would still hurt, I disagree that it would be like getting clapped. I agree that the impact would hurt much less if the bullet was deflected, but still I would not volunteer to try it out. Maybe a medieval-like steel armor would need to be very thick and heavy in order to stop bullets, I am not sure. After all, medieval armor could be pierced by bodkin-style arrows shot from a short distance.