The Tormentor's Biggest Fan is a huge fan of the Tormentor in Monster Truck Mater.
Monster Truck Fan is a van who was initially the I-Screamer's biggest fan, then became Mater's biggest fan after I-Screamer was defeated. He also appears at the end, asking for "the Tormentor's" autograph. Mater agrees, putting a tire track on his door, which he says that he will never wash it again, before he leaves. Lightning McQueen then rushes after him, asking him if he wants Frightening McMean's autograph, but he declines.