The human flag is usually performed on a pole or some sturdy structure and it’s a tough move even for those in great shape. But when you try to do it with a partner instead of a pole, it adds whole another level of difficulty. Or two.
In this video Al Kavadlo and his brother Danny gave it a try. Al went for Danny’s ankle and forearm for support and he actually managed to hold it for several seconds in this position. It certainly requires an immense amount of strength, coordination and balance to perform such a feat.