I really, really wanted to get on this Dumb Running Sonic thing which amuses me to no end. [link]
And so, as usual, my solution was to make
do it. (As if I really had to twist his arm.) I did the four extreme poses roughly in Flash, and John ran with them. Beautifully. I think John is an animation genius and I'm privileged to get to work with him.
John has posted the "work in progress" version here for the curious: