
Most historians don't bring up that last bit, but it may be Titov's most important historical contribution. Titov's zero-g upchuck was the first documented case of space adaptation syndrome, known colloquially as space sickness. NASA records show that roughly 60 percent of all astronauts suffer from space sickness on their first flight. Symptoms include dizziness, disorientation, and the aforementioned vomiting, which can collectively render a space traveler useless or, worse, a danger to his vessel and his crewmates.
NASA actually has an informal scale for measuring the severity of any specific case of space sickness, one which is named in "honor" of a particularly ignominious victim of space adaptation syndrome. And no, it's not Gherman Titov.
Who does NASA's space sickness scale openly make fun of?