Sergeant commands to the soldiers on a rock:
- stand in a column,
- first one, put your hand up, jump down!
- second, point your left hand to the left, right - up, jump down!
- third, repeat the position of a first, jump down!
...That process lasts for some time, then along passing by a lieutenant. He observs that for some time trying to realise what's going on and then shout to sergeant:
- you, gaming freak, we have a short limit of recruits and you playing the tetris with them!