There was a time when skiers sat safely inside cable cars, patiently admiring the scenery on the way up before carving down the piste with their feet safely on the ground. Those sedate days are long gone. Now, a tram is merely an accessory for athletes stretching the boundaries of what can be done at a ski resort.

Freddy Nock, a 45-year-old Swiss acrobat, accomplished the latest stunt on January 31, at Mount Corvatsch, Switzerland. Carrying just a long pole for balance—and without a safety harness—he put one foot in front of the other atop a cable car wire for 5,249 feet (31 feet short of a mile) at 9,908 feet above sea level. Nock had completed a shorter solo attempt in 2009, teetering on the cable of a tram running up Germany’s highest mountain, walking 3,264 feet for 50 minutes in front of 1,800 spectators to raise money for charity.

See the video here.

But Nock isn’t alone on the high wires of the world’s ski resorts.