The plane was hijacked!

Little Johnny looked so sad his teacher had to inquire what was
wrong. “What’s the problem?” she asked. “I hope it’s not about
your homework again.”
“Well, uh, yes it is,” Little Johnny says. “I accidentally made my
homework paper into a paper airplane.”
“That wasn’t the smartest thing to do,” said the teacher, “But,
just this once, I’ll let you just unfold the paper and hand it in.”
“Sorry, but that won’t work,” Little Johnny replied, looking even
sadder. “You see, the plane was hijacked!