How anxiety almost grounded supersonic skydiver[ Fri, 12 Oct 2012 16:04:32 EDT ]"Fearless Felix" got a bit freaked out by the pressurized suit he'll wear during his ascent and, more importantly, his supersonic descent from 23 miles up on Sunday. Getting over his discomfort was a key hurdle to clear as the Austrian adventurer set out to make the highest skydive ever.