Hoo boy. I don’t even know where to start.
The Adventures of Buckaroo Banzai Across the 8th Dimension. It’s a sci-fi action comedy. Buckaroo Banzai, of course, is a practicing neurosurgeon theoretical physicist test pilot who also fronts the world’s most low-energy band (until the Decemberists sprout from a pile of peat moss roughly fifteen years later) and invents a device that lets him drive through a mountain/other dimension, which means that the bad aliens can finally go home (somehow) and the good aliens have to get Buckaroo to stop them. Or something.