There is a factual error during C.A.R.A.'s training. She says: "On Earth, you experience a force called 'gravity', which is what keeps you on the ground. But in space, that force is much weaker--which is why things float. We call that 'microgravity'." This is actually not true. Gravity is still very effective in space--it's what keeps the moon in orbit around Earth. The reason that ISS astronauts experience microgravity is that they are in orbit along with the space station itself. In a sense, they are in freefall just like a drop-tower-style thrill ride. If the ISS was somehow able to remain at the same altitude without orbiting Earth (for example, if it were on top of a very tall tower), the astronauts would weigh roughly 90% of what they weigh on the surface.