Complex sentence: Homer then tries to apologize to Mel, and he replies that it's not his fault... but as soon as Homer suggests similarly stupid ideas for "their" next movie while leaving the theater, Mel kicks him out of his limousine.
Split into simpler sentences: Homer then tries to apologize to Mel and offers similarly stupid ideas for "their" next movie. While leaving the theater, Mel, having had enough of Homer, kicks him out of his limousine.