Reply to Favourite Instant Effects

Just wondering what sort of effects people have got mapped to one button.
I have an advance mode slicer bit of buzz, setting no3 on the other two knobs and both buttons off for an instant glitch at the touch of a button.

What instant effects do you use? Delay with freeze, Reverb or a mad chain of effects? I'm using traktor but would be interested what other software users have mapped.