This is a physical warm-up. The group forms a pyramid: one player becomes the top, 2 players behind them, 3 players on a third line, and so on.
The top player starts moving about the room (perhaps use music to guide the players). The second line follows the first player and mimics their movements and the third line follows the second line. The top player can alternate however they want (and can be guided with e.g. a change in the music).
The top player can even turn around and face the second line. Confusion will be complete. Other variations can happen when the top player bumps into the last line and takes over their movements.
All but one in a circle, one player in the middle. The middle player closes their eyes, and the rest of the group quietly chooses a leader. Middle player opens their eyes and tries to find the leader. The whole group follows the leader, in everything they do. As soon as the middle player finds out who the leader was the game is over.
This only works if movements are clear, not too fast, and if the group `follows the leader` as fast and as precisely as possible.
Players in pairs, facing each other. One starts talking in gibberish, with a specific emotion (angry, happy, in love, you name it). The other instantly copies the emotion of the first player and speaks in their own gibberish. No need to try and copy the other player`s gibberish, and both players keep talking, no pausing allowed. After about 10 seconds, the second player changes emotion, and the first one immediately follows them.
All games taken from http://improvencyclopedia.org/index.html