(a swimming game)
Divide everyone into two teams and form separate lines in the deep end of the pool, with the strongest swimmers in lead positions. Each swimmer holds onto the ankle of his teammate ahead with one hand, leaving his other arm free for a modified sidestroke. At the sound of the whistle, the two "centipedes" wriggle to the other end of the pool and back, each swimmer tagging the far wall with his free foot. If anyone's hand slips, the rest of the centipede has to wait until the link is reestablished.