Tom Cruise's space experience could turn out, well, pretty crappy if he doesn't take proper procedures when operating the toilet.
Earlier this week, NASA and SpaceX announced that it was working with the movie star on a film aboard the International Space Station. In light of the news, a few retired astronauts dished on what Tom can expect while living in zero gravity.
Both Scott Kelly and Roy Bridges Jr. tell TMZ that usage of the space toilet will be a key part of Tom's intense space training.
Scott, who's spend more time in space than any human being, said Tom needs to move very slowly aboard the ISS, as it's not uncommon for first-time visitors to vomit because of zero gravity.
"The only thing on Earth that compares to space travel is going over Niagra Falls in a barrel while you're on fire," Scott tells TMZ.
Roy noted that movement in space is no joke and the body can play tricks on you, thanks to zero gravity (think blood rushing to the head instead of the feet).
Tom's training will run the gamut of getting in and out of the space capsule and wearing a spacesuit. Plus, he'll have to learn many things that we take for granted, including how to make food and actually get it in his mouth. He'll also get training on how to sleep and clean himself while in the ISS.
The astronauts said Tom will also have to learn to prepare for a space emergency, such as space debris flying into the ISS. He'll also be trained on surviving an ocean splashdown when he comes back to Earth.
As Elon Musk, founder of SpaceX tweeted, "Should be a lot of fun!"