This is Luca Parmettano, the astronaut who nearly drowned in space. An Italian astronaut Luca was assigned to a spacewalk on the International Space Station when disaster struck. The helmet of his extro-vehicular mobility unit started filling with water. He was at risk of drowning in space. His tele-survival continued with him making the treacherous journey back to the airlock, traversing the exterior of the ISS during orbital night. Imagine mountain climbing at night in a weighted suit, with fluid in your eyes and mouth restricting your breathing, and you'd have a good idea of how insane this really was. Thankfully he survived, and engineers later concluded that contamination had clogged one of the suit's cooling system filters, causing a flood. Space is quite dangerous.