Gary Connery, 42, used a "wingsuit" to make his descent from 2, 400ft (730m) above Oxfordshire.

BBC: Gary Connery in world's first skydive without parachute

Renowned BASE jumper and wingsuit pioneer Jeb Corliss tragically crashed while wingsuit flying in Capetown, South Africa.

ENGADGET: Initial projects from 3net Studios include the world's first native 4K TV show

Cameraman Mark Sutton also jumped from the helicopter in a wingsuit but deployed a parachute before landing.

BBC: Gary Connery in world's first skydive without parachute

Recon's HUDs have already revolutionized the way wingsuit pilots Jeb Corliss and supermodel-adventurer Roberta Mancino fly by delivering flight-critical data, direct-to-eye.

ENGADGET: Recon Instruments offers Flight HUD goggles for wingsuit pilots and skydivers

Authorities believe Ruppert jumped from an altitude of about 6, 500 feet while wearing a special jumpsuit known as a "wingsuit, " which allows a person to soar and glide before deploying a parachute.

CNN: STORY HIGHLIGHTS

Leo Houlding, for example, parachuted into Baffin Island in the Arctic Circle, then spent weeks climbing an iced-up rock tower called Mount Asgard, only to leap from the top in a wingsuit.

WSJ: Banff Mountain Festival | A Nature for the Great Outdoors | By Michael J. Ybarra

This hour-long original 3D special follows Jeb and wingsuit expert Joby Ogwyn as they take viewers through the arduous process of rehab, re-learning the skills of wingsuit flying and tackling some of the biggest mountains in Europe.

ENGADGET: Initial projects from 3net Studios include the world's first native 4K TV show