So, I'm relatively new to the Superman speedrun and one of the tricks I've seen in the WR run is the underground water glitch when trying to get to Lex Luthor. JoshKeys does the sick ladder glitch that sends you to the ceiling. Today in my runs, I accidentally discovered another way of doing it. If you fall into the water pit and use the Super Spin just before hitting the bottom (I use the last row of white dots as my visual cue), you'll spin through the top of the screen and be able to run along the ceiling. Here is the clip of me doing it for the first time.

How exactly is that glitch performed (the JoshKeys version)? Has anyone documented it?

Your version is sick @StTommyBoy for sure. I'm learning this speedrun today, and I'm curious as to all options.