In PAL, I have clipped into a surface below me, (usually in 1-2) but don't really know how to purposely do this glitch in any level. I believe that you have to be on a platform first. If anybody knows exactly how to do this glitch anywhere, PLEASE respond, because this glitch is awesome.

HappyLee has made a TAS for the PAL version of the game. It uses the ground clip. If you want, you can download the .fm3 file and look at the inputs in TAS Editor in FCEUX.

I know that, but he only does it in 1-2, which is the only level I can do it in. I even said so in the post.