ORIGINAL: WMB
Snap rolls are FUN. they can be quite violent also. I've been playing with them a bunch on the 4*40 lately. When the stick movement is moderated, the snap is softened. I try to do them on uplines. My kid was flying and I was showing him how to do them. He forgot the upline part and did full throttle snaps from level flight. That got my attention!
Try moving the aileron stick the opposite direction. This gets some cool effects.
I have done them for awhile now. But this year I have really been trying to see the effects of different stick movements and having fun doing it. I have a 40 Zero with 82 Saito that snaps insane. It's amazing these things hold up as well as they do.
Do them up high!, MikeB
Also try "OUTSIDE" snaps. Elevator FORWARD instead of back. Note: have altitude or garbage sack.

Learn how your plane responds at a safe altitude before attempting lower.