Diminishing returns on consecutive stuns.

[Cogwerks]

In case you haven't found out yet, I made most of the stimulants a lot better at reducing stun duration recently. Coffee and sugar help, ephedrine is better, crank and meth are much better, and bath salts make you nearly impervious to stuns. Of course you'll have the rest of the problems of bath salts to deal with, but hey, whatevs.