Have you ever played a game for the NES called Bionic Commando? The guy you play as has a bionic "grappling" arm. This concept reminds me of that because you would grapple on to an object, swing from that point, let go, then grapple to and swing from another. So i was thinking you could call it the "grapple" or "grappling" concept. Though this translates well in my head i'm not sure the word grapple is a true enough description of what your doing. Anyways... just a thought.