Complex sentence: Brewster cooks his own goose, however, when he defies Louise's edict against sex and hooks up with Astrodome usher Suzanne (Shelley Duvall) after she impresses him (and saves him) by out-driving Shaft in her Road Runner.
Split into simpler sentences: Brewster cooks his goose, when he defies Louise's edict against sex and hooks up with Astrodome usher Suzanne (Shelley Duvall). She impressed him (and saves his life) by out-driving Shaft in her Road Runner.