The Chase - Mark Labbett Walks Off

In this particular episode, Mark "The Beast" Labbett faces a single player, Elaine, in the final chase, with £7,000 pounds on the line. Mark loses his cool after making several mistakes and walks off after losing the final chase.
This episode also marks history, as it is the first time ever that a single player defeats a chaser in the final chase. This clip is from Series 3 - Episode 18.