Crying In Space VIDEO: ISS Astronaut Chris Hadfield Shows How It's Done

In space, no one can hear you scream -- at least that's how Hollywood promoted the 1979 blockbuster "Alien." But what happens if you cry in space? In a new video, ISS commander Chris Hadfield demonstrates zero-G tears.

The results might not be what you expect.

In the video, Hadfield says he's unable to cry on demand -- so he grabs a water bottle and squirts himself an eyeful of water. What happens next? Since the're no gravity to cause the "tears" to fall, they simply form a shimmering puddle under Hadfield's eye.

"I can put more water in," Hadfield says as he gives his eye a second squirt, "so if you keep crying, you've just ended up with a bigger and bigger ball of water in your eye, until eventually it crosses across your nose and gets into your other eye, or evaporates or maybe spreads over your cheek, or you grab a towel to dry it up."

Hadfield's tear demonstation is just the latest example of the Canadian astronaut's on-board antics. He's also made videos in which he shaves and clips his nails in space. There was even an orbital jam session with Barenaked Ladies.