Ha, there's a glitch in the original Super Smash Bros. for N64 that is kind of similar to this, only you get stuck inside the warp pipe on the mario stage, and you must be Ness, for some reason it only works with Ness. The weird part is that nobody can hit you while inside the glitched pipe, but you can launch PK Lightning out of it, and I believe to be the only one to discover it so far.