BUTLER COUNTY, PA. Sky diver who died in Idaho had experience

The victim worked at a sky-diving company near Grove City, Pa.
TWIN FALLS, Idaho (AP) -- A man who died when his parachute failed to deploy as he jumped from the Perrine Bridge over the Snake River Canyon was a sky-diving instructor from Pennsylvania who logged thousands of sky dives and more than 100 BASE jumps, his friend and business associate said.
Jason Corcoran, 30, of Butler County, Pa., launched from the Twin Falls-area bridge, which is 486 feet above the river, and then tried a back flip. The parachute did not deploy and he hit the water at about 90 mph late Thursday afternoon, Twin Falls County sheriff's Sgt. Don Neuman said.
BASE stands for building, antenna, span, earth. They are the stationary places jumpers leap from, giving them a very short descent. Corcoran was with a group of seven others from the Pennsylvania area.
Corcoran worked at SKYDIVE Pennsylvania near Grove City, Pa., said the business's director, Jeff Reckard. Corcoran had made 2,150 sky dives and more than 100 BASE jumps, Reckard said Friday.
Cause undetermined
Neuman said the reason the man's chute did not work has not been determined. Several things can occur.
BASE jumpers usually throw their pilot chute out sideways so it will deploy in mere seconds, Neuman said. Sometimes, that pilot chute is caught in a vortex of wind caused by the body and will not come out.
The bridle attaching the pilot chute to the main chute also may wrap an arm or leg and not open.
"It's extremely dangerous, but it's so rewarding. You calculate those dangers and that's what makes it less dangerous," said Reckard, who taught Corcoran to BASE jump. "He just absolutely loved to jump. Someone that's never jumped wouldn't understand. That feeling, you can't get it from an airplane."
It is the first BASE-jumping death at the Perrine Bridge this year, Neuman said. Utah jumper Brian Stout died last year when his parachute failed.
"It's a premier location because it's legal," Neuman said.
Other jumpers were in a boat below the bridge and recovered Corcoran's body within about 15 seconds.