Play:

The main facilitator will be crouching in the back and will count to 3. Everyone must be quiet, if someone speaks, they get minus 1 point for their team.
The main facilitator will crouch in the back and flip a coin. The last person in each line will be watching the coin, everyone else must be looking forward waiting. If it lands on Heads the last person will squeeze the shoulders of the person in front of them.
That person will then squeeze the shoulders of the person in front of them and so forth till it gets to the first person.
If the first person feels their shoulders squeezed, they will grab the ball in front of them. If they grab the ball before the other team they get a point. The second facilitator will be up front watching to make sure who grabs the ball first and if they grabbed it correctly.
If both teams grabbed the ball and the coin was heads then both teams rotated everyone forward (everyone moves one chair forward, except the first person they move to the last chair).
If a team thinks someone squeezed their shoulder but did not and they grab the ball that team loses 1 point and rotates back (Everyone moves one chair back, so the person in the back moves to the first chair). They grabbed the ball incorrectly.
First team to 10 points wins