Film:
Sherlock, Jr. - Buster Keaton was a bloody genius. That film had awesome stunts for its time. Alternatively
Sherlock Holmes und das Halsband des Todes - a German production starring Christopher Lee with a fake nose (yes, I'm serious). It's so outrageously bad it's brilliant.

Music: Bach, violin concerto in A-minor - I used to play that one and I still know passages by heart...
Book: You're not seriously expecting me to answer that one, are you?