He means like the San Andreas mod, where you press like X+A or a button combination and it basically puts you into the freefall position when you parachute down but it constantly pushes you forward so it looks like you are flying.
I think there is a similar thing to it, I've seen a few people zoom about the place but I don't think it's like what the TC wants.
Only thing I can think of is raising the water level and making it invisible so you're swimming on top of it.
Yeah as Wallsch said about raising the water level only thing I suppose you could do on XBOX instead of Superman!