Plan 9 is a great movie. Not a Brain Damage film (Brain Damage films is a film production company), but both are MST3K worthy.
AtSonicPark- I saw Jackhammer Massacre as well!
That was a piece of garbage as well.
While not Brain Damage films, have you seen Silent Night, Deadly Night?
The sequel is freaking hilarious. I was in a hardcore punk band called Büt Cake that did a song called Garbage Day which was inspired by this scene:
http://www.youtube.com/watch?v=8xh7junyB2o
You have to see Blood Sisters. It's about a sorority of vampire chicks that bite dudes, and then when the dude gets bitten, he starts hallucinating that they are stripping. Then after that ends, they bite him some more.