Lisa: I want the most intelligent hamster you've got.
Clerk: OK.
[reaches into a box of hamsters under the counter and randomly
selects one]
Uh, this little guy writes mysteries under the name of J. D.
McGregor.
Lisa: How can a hamster write mysteries?
Clerk: Well, he gets the ending first, then he writes backward.
Lisa: Aw, C'mon.
Clerk: Look, kid, just take him before his mother eats him, all right?
-- Lisa gets a hamster for her project, "Duffless"