Insane Rooftopping!

Joe McNally recent rooftopping photo is soooooo freaking INSANE! The photo below was taken by him at the top of Burj Khalifa! i wonder if he even feel vertigo for doing that, because i am feeling giddy just by looking at the picture.

Would you be brave enough to climb up the world tallest building to take the same kind of photo? i'm not.
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