The Knife Guy and his "lovely assistant" (this girl can STRETCH!) make an appearance every week. Before the contestant's challenge he performs a strange exhibition using knives of some sort (sometimes they are on fire, and on the last show he uses shurikens, the Ninja throwing stars.) He usually performs a stunt so dangerous that even a near miss could seriously injure or kill his assistant. The contestant then bets on some other, closely related goal the Knife Guy must accomplish, either involving him or the assistant.