Add a "Stun Occupant" option to the Port-o-brig

[Megapaco]

Why not just make it so the act of being ejected gives them a (very) brief knockdown. About the same as jumping out of a disposal unit. If you require more stun time, just slap 'em with a baton. I don't see why you'd need a stun button in addition to that.

This is probably the best way to do it. Stuns the person but still gives them a chance to escape if they're fast enough.