This is a simple, harmless, and hilarious practical joke, that has claimed me as a victim. The setting is a pool hall, bar, or anyplace else with a pool (billiards) table. Place any ball at one end of the table and give your victim the cue ball. Challenge the victim to focus on the cue ball while walking around the pool table three times. At the end of the third time, the victim is to place the cue ball on the table, take a cue stick and hit the cue ball so that it stikes the ball at the other end of the table. This is very difficult to do; not because of a loss of coordination from walking and staring at the ball, but because while the victim is concentrating on the ball, you lick your finger and wipe chalk off the end of the cue stick. The victim will miscue almost every time. It gets funnier, because if the victim is like me, he/she will be determined and try it again.