A man walks into a bar.”Gimme …

A man walks into a bar.”Gimme a double, before the shit hits the fan.”
A few minutes later, same thing.”Gimme a beer before the shit hits the fan.”
This goes on for an hour or so.
Finally the Bartender goes up to him and says, “Listen buddy, maybe you should pay before you get another drink.”
“Oops, the shit just hit the fan.” He replied.