SUMAC: eh, ne hydrazinu, ale tomu druhýmu. ale to je fuk...
Vance D. Brand - Wikipedia
https://en.wikipedia.org/wiki/Vance_D._Brand#Apollo-Soyuz_Test_Project
The mission almost ended in disaster when, during the final stages of the mission, the crew was exposed to near fatal amounts of nitrogen tetroxide gas. The reaction control system had been inadvertently left on during descent, and the poisonous fumes were sucked into the capsule as it drew in outside air. Brand briefly lost consciousness and all three crewmen required hospitalization in Hawaii for a number of weeks after landin