Climbing turnips
From Glitches
From the game Super Smash Bros. Melee for the Nintendo Gamecube
Have two human players, both as peach. Now, have each of the two players get out a turnip. At the same time, throw the turnips at each other. If done correctly, the turnips will rebound off each other really quickly and repeatedly, so they'll just keep climbing.
Submitted by: Jesse