My coworkers know I'm always on the lookout for unusual reference questions. I was sitting at the desk with a coworker yesterday, when she answered the phone - of course, I could only hear her side of the conversation, but it was enough:
Coworker: Reference desk, can I help you?
Coworker: [turns towards me] You're looking for a version of the movie Casablanca that stars Bugs Bunny, but you don't know the title? Sure, let me check.
[she searches online for casablanca bugs bunny]
Okay, that version is called "Carrotblanca" and [searches our catalog] it looks like we have it, on a DVD called "The essential Bugs Bunny."
She put the DVD on hold for the patron, and everyone was happy. Especially me - patron gets what he wants, and I think "a version of the movie Casablanca that stars Bugs Bunny" is absurdly funny.
Interesting post-script: when I looked up the DVD record while writing this post, I noticed that "The essential Bugs Bunny" also includes Hare and loathing in Las Vegas - now that is something I've got to see.