Handling two balls at once

Each player in a pair of two has a ball. They throw their ball across the net at the same time and catch the other player's ball afterwards.

Variations:

1. The player on one side of the net decides what the other player will do. If the player who throws first throws the ball over the net, the other player will have to throw to ball under the net. If the player who throws first throws the ball under the net, the other player will have to throw the ball over the net.
2. The ball has to be caught with one hand.
3. The ball has to be caught with arms completely extended in front of the body at the height of the hips and has to be thrown back over the net from that position.
4. Each pair of players has one ball. One player throws the ball over the net. The other player awaits the ball with his arms extended, bumps the ball on one arm, and catches the ball.