Here’s another breathtaking video of a amazing fearless climber runs along the slenderest of ridges at the peak of a 8,550 ft mountain. This vertigo-inducing footage was filmed by teacher Mark Harrison while climbing the dangerous Mount Lady MacDonald in Alberta, Canada, with his brother Thomas, 31, and two friends. Shot in July, the video shows the adrenaline junkie balancing along the steep and slender precipice while holding a camera – before running along the rocky summit. You can also feel free to watch and see this amazing and thrilling climber’s adventure below. Have some fun, be amaze and enjoy!