The bartender thinks that this guy is a nutcase, but he wants his $1,000, so he agrees. The bartender gets out a shot glass, paces off thirty feet, and the contest begins.
The man sprays beer all over the bar. He doesn't even touch the shot glass. When he finishes, the bartender grins at him and says, "Well, I guess you owe me $1,000, huh?"
The man answers, "Yeah, but I bet all of those people outside the window $500 apiece that I could come in here, spray beer all over the bar, and have you smile about it."