"SPIEGEL: It doesn't sound like a very nice way to go, drifting through nothingness in a spacesuit, waiting to die.
"Walter: On the contrary! When you're slowly running out of oxygen, the same thing happens as does when you're in thin air at the top of a mountain: Everything seems funny. And as you're laughing about it, you slowly nod off. I experienced this phenomenon in an altitude chamber during my training as an astronaut. At some point, someone in the group starts cracking bad jokes. Our brains are gentle with us. A person who dies alone in space dies a cheerful death."