Little Johnny's Homework Excuse
"Well, uh, yes it is", replied Johnny. "I was stupid and made my homework paper into a paper airplane".
"Johnny, you're right that wasn't a very bright thing to do", said the teacher, "but this once I'll let you just unfold the paper and hand it in".
"Oh, but that won't work", said Johnny, looking even sadder. "You see, the plane was hijacked".