People who sky dive fall about 200 mph. 11 stories may not have gotten that fast. A skydiver in Montgomery, Alabama had his parachute fail to open, then the tried his back up chute, and it failed. He landed someones grass front yard. He landed and fell on one side, broke both legs in multiple places, falling over broke all ribs on one side as well as his arm in multiple places. Broke his neck, but didn't hurt the spinal column. He survived with no major internal injuries, but was in a full body cast, according to the news. Don't know how he turned out. Probably months of rehab.