Oh, and he was also free soloing, which means that he had zero safety gear attaching him to the line. Please enjoy this video/free anxiety attack.
Earlier this month
crazy brave person Spencer Seabrooke broke the world-record for slacklining, the activity-sport-thing that's sort of like tightrope walking, but on a webbed slack line that has a bit more give than a tightrope. Seabrooke broke the record by walking for 64 meters while 290 meters above ground (that's about 209 feet across and almost 1000 feet above ground, for my fellow Americans who feel too lazy to think about conversions right now). And he did it without any safety gear, which made his fall right at the start all that much more terrifying.
Congratulations, Spencer. I am glad that we are all celebrating your achievement and not trying to find your bones.