Cool CAS to mess with.
Tony Hawk's Downhill Jam actually added a cheat for this. Different model, I can't remember what of, but it's rigged differently and distorts like crazy.
I've always wondered if the skeletons could be swapped out via scripting just to run around as dogs and cats and crap. As literally useless as it would be, considering you wouldn't be able to do tricks.
In before new gamemode where half the players are animals that just terrorize skaters to prevent them from reaching a certain score/flag while players shoot out treats similar to Firefight to pacify the animals for a few seconds.