If heights aren't your thing, you might want to skip this video.
Still there? Okay, let's carry on...
Recently, a world record breaking slackline walk by Spencer Seabrooke proved that when you take up hobbies like this, there's a fine line (quite literally) between life and death.
Walking 209 feet across a Canadian canyon, the unharnessed daredevil lost his balance twice and had to react quickly to grab hold of the rope - sparing himself a fall to the ground 1000 feet below him.
The video itself is a tense watch. Even though we all know he makes it to the other side, hearts can't help but sink a little at points where he appears to be falling towards the canyon floor...
https://youtu.be/EzrI8BeOw_0
