This is a thing where I'm fooling around with the effect of hitting the snare rim with the shaft of the brush on an angle and slowly bringing the brush wires down to the head. It creates a sort of buzzing sound, I don't know what it's called. Anyway, I applied it to some 4/4 swing. 2 feel swing, cha-cha, and samba. Hopefully you'll find it useful.
Here are two vids of it in action.