A man is eating dinner in a restaurant. He notices a kid at the next table flipping a quarter in the air and trying to catch it with his teeth. The kid misses, quarter gets stuck in his throat and he starts to choke. The man calmly gets up, walks over, grabs the kid by the nuts, and squeezes. 

The kid yells in pain, and the quarter pops out. The man picks it up from the floor, puts it in his pocket and goes back to finish his meal. A woman at another table goes up to the man and says "I never saw anything like that. Are you some kind of new-age doctor?" The man says "Not me. I'm a stock trader."