Tom Servo: My rape victim refuses to come to Lamaze classes!
Quite a few of the jokes were about the rapists getting pregnant, which the movie ended up really using.
Briar Patching: Related to Black Comedy Rape, jokes along the lines of "If all four of you get involved, I understand. It could get rough, and that's fine." "I beg of you, don't lightly kiss my belly and don't nibble on my nipple buds, and don't drag your shiny hair across my body because I HATE that!"
Servo is teaching the strange tune ("Hom, de-heh-heh-heh, hoo-ah, hoo-ah") from Monster A-Go-Go to Mike.
Don't Explain the Joke: Forrester and Frank are both completely and utterly giddy at the idea of a radio station being named after a person, taking great pains to explain how awesome a pun it is to the SOL crew.
Nightmare Fuel: Invoked, as the Mike, Crow and Gypsy react badly to Servo's new head. Crow is reduced to a shambling heap of sobbing while Gypsy says in disgust, "I feel ill!" as she flees.
Off with His Head!: Tom Servo replaces his head with a very disturbing ventriloquist dummy's head. Mike chases him around the SOL, then pries his head off. Also qualifies as an Eye Scream, as Mike gouges his thumbs into Tom's eye sockets when ripping the head off.See the horror show here.
Overly Long Gag: The post-movie host segment has Crow and Mike re-enacting the awkward hold-up scene from early in the film: Crow sticks a gun on Mike and the two just stare at each other in silence. It goes on for about a minute, until Crow finally chops Mike on the back with his gun.