"Professional Highliners" are a thing

In this video we were surprised by three things. One: humans "highline" without actually connecting their highline to things other than humans. Two: "the world's longest human-anchored highline" (76 meters) is a category with competition. Three: people can be "Professional Highliners." There are three men labeled as such in this video! Amazing.

Then again, is it any stranger than being a champion in backward running?