In the area I run in there is another guy that runs barefoot. But he always has his arms flying all over the place with his hands doing a sort of "jazz finger" thing. Oh his posture is like ramrod straight. I tried to figure out if this was some crazy technique but no luck. The first few times I saw him he was running down a hill so I thought he was just trying to keep balance and honestly its sort of painful to run down so maybe this helped. Since then though I've seen him on flat easy running surfaces and he's always doing the same thing. I'd ask him but if he just runs funny I'd feel bad for embarrassing him. I thought maybe someone here had heard of something like this?