A group of kids you want to be friends with are daring each other to do things, and now it's your turn. The dare: go and tell the new dinner supervisor that the headteacher said your class is allowed to skip the queue. It's not true. They think it'll be hilarious to watch the supervisor believe it and let you through. Everyone's looking at you, grinning, waiting. If you do it, you're in — they'll think you're funny and brave. If you don't, you're the boring one who bottled it. It's "just a joke," they say. But the joke is lying to an adult who's only trying to do her job, and you're the one who'd be standing there saying it.