A boy called Theo is normally quite sensible. But at a party, a group started egging him on to do something silly and risky — climbing onto a shed roof to jump into a paddling pool. At first he said no. But the crowd kept cheering, chanting his name, filming, getting louder every time he hesitated. You could see him changing in real time, getting swept up, starting to believe the cheering meant it was a good idea. He climbed up. The kids who'd egged him on were thrilled — right up until he landed badly and hurt his ankle. Then, oddly, most of them drifted away.