From: YouTube on Thu, Feb 03 2011 9:08 AM

Play as Slim Jim At the rider selection screen in pro quest mode, press [Down] [Down] [Left] [Right] [Up] [Up] [Modifier Airs] to unlock Slim Jim. Alternately, successfully complete the game with any rider to unlock a bonus bike and Slim Jim. Play as Amish Boy Successfully complete the game with...