In order to preform this maneuver, you must travel to North Carolina or Tennessee or any other state that sells large fireworks. Right when your girl is turned on and ready to go, pick your rocket and jam it in her butt and light it. You then must commence sexual intercourse with her and finish before you see the pretty colors. This is a popular position to celebrate the birth of America.
Bob - "Hey Fred, why do you look so glum today?"
Fred - "Well Cindy and I did the Space Race last night and I took too long."