Do a search of Richard Spooner. He is notorious for his "un-traditional" position. His theory is that he is loose to allow his horse to jump without being inhibited by rider stiffness or something. For him it's not that he's lazy or doesn't care about his leg position. In fact, I saw a video of him riding a hunter in a derby and his leg was quite good.
Regardless, I don't think positions like these are ones to emulate or that we should dismiss a good position. Yes, it's harder to keep a good leg as the jumps get higher but the VAST majority of us simply cannot be balanced or effective with a loose leg.
Last edited by upnover; 12-06-2012 at 02:57 PM.