Fun, simple time-filler activity that promotes group cooperation.

Everyone in group crowds together into a tight circle with hands in the middle.
Grab a random hand with each of your hands to create a large knot of people.

Patrol leader lets go with his right hand, making two loose ends to unravel the group into a straight line.

Optional: Instead of having loose ends, try to unravel the group into one large circle without breaking hand contact at any time.