John Stapp travels at 421 m.p.h. in a rocket powered sled making tests for pilots.
SV & CU Lieutenant Colonel John Stapp being strapped into the land sled. SV rockets being readied. GV 3,500 feet long runway. SV sled at end of runway. CU John Stapp ready for run. LV pan, sled making its run - cloud of water shoots up as sled is slowed down. CU Stapp's reaction as the rocket starts off. SV pan, rocket slowing down. SCU Lieutenant Colonel John Stapp.