Space has a lot of ways to kill you. It’s a beautiful place to contemplate and a thrilling place to visit, but for all its appeal, it’s got murder in its heart. There is almost no way you can imagine to die that space won’t be perfectly happy to deliver, save one: you can’t drown there. That, ultimately, was what made it such a surprise in 2013 when Italian astronaut Luca Parmitano nearly drowned to death while orbiting 250 miles above the Earth. TIME’s Jeffrey Kluger takes you through the events that make it one of the most harrowing space missions of all time.