[describing 15 terrifying seconds in a rocket plane racing over 1,400 miles an hour and spinning wildly, supersonically out of control, rising 90,440 feet over the earth in 1954] I begin to feel weightless, and I'm flying so fast my instruments can't keep up - they show what happened two miles ago. I'm climbing so steeply I can't see the ground, and I feel confused. I have a sense of falling, and I want to grab something for support.