ass slap animation help

[alwaysblue]

I know there bodylanguage for it but sometimes it is a bit inconsistent so I want to make my own using timeline and for the life of me I cant seem to get the slapping animation right, I tried speeding it up but it looks goofy and doesnt give that oomph force, can someone give me some scene examples

 

[hazmhox]

There's a demo of the slap feature for VAMM2 in HZMDemos.
Here's a snippet of it:

There's not much to tell about it, you need to configure the hand joints properly to have a higher position/rotation hold ( respectively a value above 5000 and 500 works in general ).

And a slap, beyond the funny ones I do here when she grops her cheek, should be fast and with a bit of bounce back.
The best approach when you have doubts is to try the animation you wanna do "with yourself"... slap your thigh and look your body mechanics, if you can't figure it out this way, record yourself slapping and look at it frame by frame. : D