While watching Hellboy I was reminded about something Dad and I had discussed ages ago about bulletproof villains in movies. We had noticed that the people who shoot them repeatedly invariably remain within striking distance and get taken out. Dad said that anyone who walks calmly towards you when you have a gun either A) is crazy or B) knows something you don't. Either way you should pay attention. We decided that you should try two shots, and if you see that they're good but they don't do any sort of damage, then you get the hell out of Dodge immediately.