Comments by "rejvaik" (@rejvaik00) on "Fall from an SR-71" video.

  1. What I learned today: Apparently if you go up high enough you will boil alive. Not fun
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  2.  @emilychb6621  The Armstrong limit or Armstrong's line is a measure of altitude above which atmospheric pressure is sufficiently low that water boils at the normal temperature of the human body. Exposure to pressure below this limit results in a rapid loss of consciousness, followed by a series of changes to cardiovascular and neurological functions, and eventually death, unless pressure is restored within 60–90 seconds.[1] On Earth, the limit is around 18–19 km (11–12 mi; 59,000–62,000 ft) above sea level,[1][2] above which atmospheric air pressure drops below 0.0618 atm (6.3 kPa, 47 mmHg, or about 1 psi). The term is named after United States Air ForceGeneral Harry George Armstrong, who was the first to recognize this phenomenon.[3]
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