Mad, or just the ultimate thrill-seekers? 
 
 The Soul Flyers, a French group dedicated to Base Jumping, might just be both. 
 
 Footage shows the base jumpers in an eye-watering stunt, leaping off a Swiss mountain top in wingsuits and gliding down to meet a plane below. The stunt took more than 100 attempts to perfect. 
 
 Statistically, base jumping is more dangerous than skydiving because there is so much room for error. A member of The Soul Flyers was killed in 2011 when his parachute failed to open. 
 
 But the accident hasn’t deterred the group. As the video shows, dedication pays off. 

 Two French daredevils have redefined the idea of catching a flight. 
 
 In theory, their stunt was quite simple. All Fred Fugen and Vince Reffet had to do was strap on a wingsuit, then leap from a 13,000-foot mountain in the Swiss Alps and fly into the open door of a light plane. 
 
 Turns out, it's not so easy. 
 
 CBS News 
 
 Every near-miss meant gliding back to Earth -- and starting all over. 
 
 Working with Red Bull, they practiced the stunt more than a 100 times -- until they got it just right. 
 
 With their manmade wings, they soared down the mountain, head-first. 
 
 The plane dove after them, slowing to the same speed: about 85 miles per hour. 
 
 Suddenly, the target was in sight. 
 
 "Go for entry, go for entry," can be heard crackling over the radio. 
 
 Reffet went first. It was not the most graceful landing, but who cares? 
 
 Fugen was next -- and he nailed it. 
 
 Loud cheers and high-fives ensued. 
 
 That's what we call wingin' it! 

 Published on Nov 28, 2017 
 
 French wingsuit flyers recently completed an unbelievable stunt following a B.A.S.E. jump from the top of the Jungfrau mountain in Switzerland. Fred Fugen and Vince Reffet, known as the Soul Flyers, caught up with and flew into a plane in mid-air. 
 
 
 
 As part of their project A Door in the Sky, which they had spent several months training for by completing more than 100 test flights in Empuriabrava in Spain, the duo B.A.S.E jumped from the top of the Jungfrau, one of Europe’s highest mountains, and flew into a Pilatus Porter light aircraft in mid-air. Now that's a different way to catch a flight. 
 
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– Vince Reffet initially thought the stunt would be relatively easy. He soon learned that base jumping from a 13,000-foot mountain peak, gliding and hitting a target little bigger than a body is the opposite of easy. After two months of training, however, that's exactly what Reffet and fellow wingsuit jumper Fred Fugen pulled off over the Bernese Alps in western Switzerland. A video by sponsor Red Bull shows the French duo known as the Soul Flyers leaping from Jungfrau Mountain and hitting speeds of 85mph, before hurtling through the open door of a Pilatus Porter aircraft flying at roughly 10,000 feet. The feat—inspired by French base jumper Patrick de Gayardon, who jumped and returned to a plane while wearing a wingsuit in 1997, per Red Bull—has been viewed more than 1.7 million times in two days. Yet the two-minute video doesn't give any indication of the amount of practice the accomplishment required. "When we started to train, we thought it would be easier to be honest," Reffet tells Red Bull. "Then we realized that it was quite a technical and mental challenge. We had to be focused … It takes all your energy." The pair actually made 100 attempts, at least 20 of which were successful, before the main event, in which they used "a push-to-talk system" to communicate with each other and the plane's pilot, Philippe Bouvier, reports the Telegraph. Together, they "redefined the idea of catching a flight," per CBS News. "You're falling down and all of a sudden there’s no air anymore. The feeling is quite strange," says Reffet. "When you're in the plane and you see your friend flying closer and closer, it's incredible." (A legendary base jumper recently died.)