You did something embarrassing — tripped in front of everyone, called the teacher "Mum," got a name wrong, said something that came out completely stupid. It happened days ago. Everyone else has clearly forgotten. But you haven't. The memory keeps replaying in your head, and every time it does, you cringe all over again, as if it's happening live. You're sure people are still thinking about it, still judging you, even though there's no real sign that they are.