In the level Pipes and maybe Sewers, have one character stand on the elevator and have someone jump on his/her head (from the above area). You will only be pushed up by the force of the elevator, so you hover. Example: Let's say the elevator normally goes 5 feet up and 5 feet down. You go up 5 feet, you go down 5 feet - you're where you were before. However, with the bug, you go up 5 feet, the elevator goes down and you're hovering. You can keep on going up and up and up.
Submitted by: AndyDark