In an original incarnation of the script Calvin was the character who couldn't piss, and Brian was a character who couldn't get the girl. The parts were combined at the last minute.
The "foreign" guests at the bar speak German with Austrian accent and the guy says, "Did you see the blonde girl? That's unbelievable, her breasts are incredible!"
Producer 'Jeff Balis (I)' makes a cameo as a diner at Shenanigan's.
As an April Fools' Day joke, director Rob McKittrick and actor Luis Guzmán staged a "diva fight" on set. During the filming of the scene where Calvin imagines his co-workers cheering him on at the urinal, Guzmán pretended to ditch a line from the script in favor of his own line. The fight was so realistic that the other actors on set became very uncomfortable and quiet when Guzmán "stormed" out.