Thats pretty cool,I think I seen that a few weeks ago also on one of Crossfit's WOD with a pair of Elite rings.It definitely blows the "I cant find anywhere to anchor my TRX" excuse out of the water.
Semper Fi
"Of every 100 men 10 shouldn't even be here.80 are nothing more than targets.9 are real fighters,we are lucky to have them:they the battle make.But one,one of them is a WARRIOR,and he will bring the others home." -Hereticus,500 BC