Do you mean 1-2G where you clip into the pipe?

no, in pal it's possible to clip through the floor, which the pal tas does to save time in 1-2

I think it doesn't have to do with subpixels, only Y pos. So I guess it's just jumping off the elevator at the right time. I'll try to recreate it later

Well you have to jump for a specific number of frames off the elevator when it's at the correct height.. There are a few spots and number of jump frames that work, but, not very many. You can see an example here: .. see the inputs on the right, and the exact jump spot he used.