Um, nope, I think we know about that. If it's jump-kicking your way up a slope, then we already know. I thought you were talking about climbing a slope as if it were a tree. I used that trick to avoid going up half of King Bob-omb's mountain.
But as Super Mario 64's been proven to be like swiss cheese with glitches everywhere you look, I'd be surprised if anyone found a truly new glitch.
