eileen collins: when t boosters light, you know you're going. starts shaking.it's like you're in a room that's on fire. rhea sheddon: you think you're prepared until it feels like thexphole world's justded. a lot of noise, vibration, acceleration. and that's probably the first five, ten seconds. kathryn sullivan: ow you've got 70,000 hors pumps pulling fuel through those engines and high-speed ts. so, when you're sitting on eight million pounds of thrust, you're paying very close attention to all those dials. rhea sheddon: luckily, i was on the flight deck