Changing room

You walk down the hallway, turning toward the gym. The sun's rays play on the walls. The air, despite the fact that it's winter, is warm and cozy. You feel sleepy, your eyes closing of their own accord. A couple of your classmates are standing near the locker room door. You're about to go through the right door, when suddenly you're pushed into the locker room for the opposite sex. You fall to the floor, your scraped knee stinging. At that very moment, the door slams shut, and laughter is heard behind it. You turn around, confused, and freeze: everyone in the place is looking at you.