I assumed Bob is basically one of the Boomers from Left 4 Dead and you should clear out when he dies because he's going to explode.
I like how Bob claims he's a "fast draw" and has been since the Boy Scouts. For one, skills atrophy if you don't spend time practicing and improving upon them. Two- I must have missed the merit badge for advanced combat shooting that Bob so obviously has.
A scout probably (and in Mass, this is a big maybe) spent some time with pellet guns and .22s. Maybe shotguns. Of which only the basics transfer over to combat shooting. But I suppose Bob's mind is so warped by video games and movies that he assumes once you learn how to use the basic thing you are an instant expert in all other things in that category.
Which is why right after earning my motorcycle endorsement on a 250cc single I went to win the Isle of Man TT the very next week! Oh wait, I didn't, because that's not how reality works.