another bug, this time with Pico
if you fire the BFG and try to use the mark at the wrong time you just can't use your weapons anymore
this one isn't a bug but the mark gets kind of irritating when you bring teammates into the mix because to get the ammo Pico has to be the one to kill the marked enemy but it takes increased damage (and Pico still has to finish the mark animation to use his weapons but the animation is short so it doesn't really matter) so there's a very high chance that your teammates kill it either by accident or on purpose and nobody gets any ammo