Real-life astronauts can easily point out flaws in the plot behind the Oscar-nominated movie "Gravity" — but they don't deny that it's a head-spinning thriller of a movie. And one of the current residents of the International Space Station, NASA astronaut Rick Mastracchio, jokes that even he might learn a thing or two from the on-screen perils of Sandra Bullock:
It's not as if Mastracchio hasn't had enough practice already: Back in December, he and crewmate Mike Hopkins took on a series of "Gravity"-level spacewalks to fix the space station. Along the way, Mastracchio had to deal with a spacesuit wardrobe malfunction and a mini-blizzard of potentially toxic ammonia. Note to screenwriters: Keep those plot twists in mind when you're writing the inevitable "Gravity" sequel.
