Heads down, thumbs up

That day the Australians teachers came to our class and taught us how to play 'heads down, thumbs up'. First, they choose 4 people to come out. Each of them have to push a person's thumb down (our heads are down). Then when our heads are up, the 4 people who got their thumbs pushed down had to stand up and guess who pushed their thumbs down. If they get it wrong, they have to sit down. If they got it right, they have to switch places with the person who pushed their thumb down. I didn't get my thumb pushed down. So sad. I wanted to do it. Anyway, the Australians are going back tomorrow.