Amazing footage of a proximity flyer tearing through a trench line in a mountain range in Switzerland. <br /><br />The video, filmed at the weekend, shows the dare devil plunging off a mountain top and wing suit flying through the trench line off Sputnik exit, a mountain in Walenstadt. <br /><br />The trench line, known as "The Crack", is a popular spot for base jumpers and adrenaline junkies.
