[McMock]

You're on the field trip, your last activity is a walk through a forest. Every kid in the class has been given a laminated map. They've all agreed to pull one on you, and they threw away their maps in the forest, except one map they used to get back.

Now, the guy from the forest doesn't want to let you go unless he gets back his laminated maps.

Searching for the maps will take a really long time, because the kids didn't throw them all in one place, and half of them have no clue where they left theirs anymore. The guy doesn't accept payment for his maps. There are no phones nearby (duh, it's a forest). The kids are supposed to be heading home on the bus right now.

Flex your teachermuscles. This one, or a variant, you'll be sure to run into, and you'd better be prepared.