In 1965, Soviet cosmonaut Alexei Leonov stepped outside Voskhod 2 for the first spacewalk in history, and his suit ballooned so badly in vacuum that he had to bleed oxygen through a valve to fit back inside before orbital darkness - Space Daily

On 18 March 1965, Alexei Leonov became the first human to float free in space. His suit ballooned so badly in the vacuum that he had to bleed oxygen out of it, head-first into the airlock, sweating six kilograms in minutes — and he never told mission control …