The incident that Thompson is referring to involved an astronaut at the International Space Station on July 16, 2013. Italian Luca Parmitano was about an hour into a planned six-and-a-half-hour space walk when he felt water on the nape of his neck. Needless to say, the presence of water like this is really not a good sign when you’re wearing a helmet in zero gravity.
Parmitano reported the water to ground control, and they brought the space walk to a premature end. However, by the time the astronaut made it back to the safety of the space station’s airlock, three pints of water had seeped into his helmet. It filled his ears, nose and eyes, and he even had some in his mouth – so he was understandably having difficulty breathing. NASA described the incident as a “high-visibility close call.”