The air's much thinner up there (99% of the atmosphere is below 20 miles up: http://www.albany.edu/faculty/rgk/atm101/structur.htm http://www.albany.edu/faculty

The air's much thinner up there (99% of the atmosphere is below 20 miles up: http://www.albany.edu/faculty/rgk/atm101/structur.htm http://www.albany.edu/faculty/rgk/atm101/structur.htm). Also important -- the 120 mph seems to be in a spreadeagle position.