So
some footage I used it's from an Nasa's experiment called Project Excelsior 1959/1960
That guy Joseph Kittinger passed through atmosphere about 31 Km altitude by Helium Baloon (so you right !).
If I remember right, after him others try to do something similar, but all of them died.
Anyway I liked to use those frames, in that way, just for editing reasons
But of course I aggree with your remark