Bill Clinton is placed against the wall, and just before the order to shoot him is given, he yells, "Earthquake!" The firing squad falls into a panic and Bill jumps over the wall and escapes in the confusion .
John Kerry is the second one placed against the wall. The squad is reassembled and John ponders what his old pal Bill has done. Before the order to shoot is given, John yells, "Tornado!" Again the squad falls apart and Kerry slips over the wall thus making his escape.
The last person, George W. Bush, is placed against the wall. He is thinking, "I see the pattern here, just scream out a disaster and hop over the wall!" As the firing squad is reassembled and the rifles raised in his direction, he smirks his famous smirk and yells,