For the fourth challenge in "Charity Case" (Season 1, Episode 14 ), the guys find themselves in the park with a small toy RC car. The challenge has one of the guys at a time stand in the middle of the park pretending to drive the RC car. However, the car is really being controlled by one of the other hosts, who proceed to drive it as poorly and annoyingly as possible. The challenge for the guys is they can't apologize or say sorry for any of the car's actions.
First up are Q and Murr, and while Q is a success, Murr caves pretty quickly. Joe's turn involves a bride getting run over, but she doesn't raise a fuss and Joe succeeds. Sal is on the clock next, and his turn is the best. Joe is controlling the RC car, and he starts repeatedly running into the same woman. After a few bumps, she starts to get fed up, and warns Sal if he does it again she'll throw it in the park fountain. Joe, being Joe, rams her again and causes her to make good on her threat.
The challenge is over, but Sal gets a pass because he never ends up apologizing. While it would have been funny to see Q and Joe's attempts, the woman throwing the RC in the fountain was still pretty hilarious. It was one of the best fan interactions on the show, making it a top prank for the series.