In April of 1975 the Soviet Union launched a Soyuz carrying cosmonauts Vasily Lazarev and Oleg Makarov on what was supposed to be Soyuz 18, a 2 month mission to the Salyut 4 space station. Instead it turning into a record breaking unintenionally suborbital spaceflight which returned to the atmosphere minutes later after going higher, faster and further than any other suborbital spaceflight.
The crew ended up experiencing over 20g's during reentry and landed on the side of a mountain, with the parachutes snagging on trees and saving them from rolling downhill to certain death.

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