A few pieces of info, if any of you are playing with this:
Setgrav makes you lighter or heavier.
Normal toon gravity is 0.4.
The lower you go, the 'lighter' you are - 0.3, 0.2, 0.1, each will make you 'jump' higher, for example.
0.0 will actually make you 'fall' up.
The more negative you go, the faster you will 'fall' up - and take damage if you hit the ceiling too hard.
Going above 0.4, makes you heavier.
I can't recall exactly where, but somewhere around 2, you'll actually start being banged into the ground again and again (and take falling damage if you don't have envirofall or envirofall2 on).
The effect you should see, as you do 0.5, 0.6, 0.7, etc. - is that jumps are shorter. Also, even before 2, you may see falling damage after a jump (not much, but it probably would).
I used to use it to max safe fall on any toons that had it, pretty quick. Go somewhere nobody comes around, set envirofall2 DC on, /setgrav 10. Chill out a few, and when it's maxxed, /setgrav 0.4.
htw