We did explosive decompression from sea level to 10,000. Fun stuff. Clouds form in the chamber. Going higher than that isnt actually much more violent as the

We did explosive decompression from sea level to 10,000. Fun stuff. Clouds form in the chamber. Going higher than that isnt actually much more violent as the bulk of the atmo is below 10,000. As for oxygen, what matters is the partial pressure of the oxygen rather than the pressure of the other gasses. Breath pure nitrogen at sea level and you will pass out just as quicky as at altitude.