I'm not sure about "don't roll your own parachute" as it should be common sense, but well, in 1912 a parachute inventor died while testing his creation. https:

I'm not sure about "don't roll your own parachute" as it should be common sense, but well, in 1912 a parachute inventor died while testing his creation. https://en.wikipedia.org/wiki/Franz_Reichelt https://en.wikipedia.org/wiki/Franz_Reichelt