Unanswered questions in movies

[Trevor]

1. What was in the case in Ronin?
Trevor's underpants
2. What was in the case in Pulp Fiction?
Trevor's undies with a band-aid
3. What was in the case in Kiss Me Deadly?
Trevor's undies going nuclear
4. Who was Keyser Soze in The Usual Suspects?
???
5. Did they really need a bigger boat in Jaws?
???

[Leah]

4. BULL
5.-No, they needed your underpants Trevor 

[The Burgomaster]

Q: What was the meaning of "Rosebud" in CITIZEN KANE?

A: It was the shape of the skid-mark in Trevor's underpants.

Oh, sorry, they DID reveal the meaning of Rosebud in CITIZEN KANE.  I must be thinking of something else.