I learned this from my sister, who learned it at camp one summer.

1. Assemble a crowd of victims and inform them that you can call rabbits.

2. Ask the assembled patsies to put their hands behind their heads and concentrate on rabbits.

3. Shout Rabbits! Here rabbits! loudly and encourage the crowd to do likewise.

4. Ask, Anyone feel a little hair? (hare?)

5. Run like hell!