Think Before You Speak

I feel like I am constantly setting up a great joke; the only problem is, it's me that is the recipient. Not so good when you are the teacher...Today's:

Student: What's wrong with your bird, Ms. S? (Holding up my paper-made crane)
Me: What do you mean?
Student: Only one of the wings move.
Me: What can I say...it's a bit slow...
Student: Just like it's owner.

Yeah.