They were set up to fire in rapid succession, probably for screen shake (didn't bother me), but the end result was my system going from 50fps to <10 fps due to all the particles it created.
PGI fix your god damned particle system so this doesn't happen!
Edited by Scout Derek, 10 April 2016 - 07:46 AM.
edited click-bait title, don't try it again please.