I survived the Rocket shirt

If the first three Saturn V stages became a single-stage, those giant F-1 engines would swallow all the fuel in about 4 1/2 minutes – and fall into orbit. Or on the other hand, they could put it into orbit, but with much less payload. All events leading up to I survived the Rocket shirt and after the launch are meticulously planned, and the crew and support staff practice extensively before the actual launch.