I love the car chase scene
With the tailing car that keeps falling apart. Very funny. I'm surprised someone hasn't lifted it more directly for another film.
There are a few scenes that are very funny in this. Another is when the grandson breaks his Mulrooney out of the sanitorium, with the snoring, the guard who puts the cotton in his ears, etc.
http://www.rateyourmusic.com/~JrnlofEddieDeezenStudies