Mystery Science Theater 3000 S07 E06 Laserblast

"We've got Movie Sign!"

In the theater, the crew watches as a disaffected teen with a cool van discovers an alien weapon in the desert and is driven to go on a killing spree in "Laserblast" (1978). Meanwhile, in Deep 13, Dr. Forrester’s funding has been cut, so he’s cutting the satellite loose.