I also know another lucky SOB (Cpl) that had an RPG skip off the side of his helmet - he killed the RPG team as they were gawking that he stood back up. Comforting to know that their most probable last thought, on their way to hell, was "HTF did that happen?"
- side note they probably didn't pull the pin.
Kevlar helmets - They work.
Just say "a bullet bounced off my helmet".