. >> reporter: lookknd l lten closely. >> oh! >> reporter: that's professional skier ian macintosh plummeting 1,600 feet with the sounds of every painful bump and grunt recorded on his way down. >> oh! oh! >> it felt like an eternity. it really did. i thought, this is never going to stop. >> reporter: macintosh was filming "paradise waits" when he mistakenly skis into a five-foot trench and wipes out. >> oh! oh! >> i had no o ea that was coming. i knew at that point it was game over. i was going tort ride of my life. >> reporter: that's the very moment you hear him cry out. >> oh! no! >> i i felt like i was getting hit by linebackers the whole way down the mountain. over and over and over again. >> reporter: while macintosh was fallllg he was thinking. he made the decisisn to deploy the avalanche air bag that was built into his backpack. >> pull that white handle for me right there. there's your life jacket. for when you're flying down the mountain. >> you're thinking all these things while in a death spiral. >> to do what i do f