Dominic Lacasse is a French acrobat, who also does parkour, chinese pole and his specialty, the human flag. He also teaches strength training. In this video he does a beautiful performance with an Orchestra, Demonstrating his incredible strength and ability at the human flag. Watch till the end for when he does an isolated walk in the air.
He also holds or is trying to break the Guinness World Record for human flag endurance.
This video shows some more of his amazing feats of strength.
Lacasse is French-Canadian and he does hold the Guinness world record at 39 seconds.