Here's Huey's lungeing session today. The weather was kind of horrendous; it pretty much poured the whole time.
Unfortunately, my camera's battery died, so you don't get to see Huey's super work in the other direction, and the massive amounts of FOAM he produced! He tends to be quite dry-mouthed, and today was by far the foamiest I've ever seen him.
I am such a big believer in lungeing done well (with side reins and a sense of purpose -- not allowing the horse to randomly charge about and "get his bucks out"). You can create straightness, forwardness, thrust, submission, obedience, and focus. It fosters a wonderful level of trust -- a year ago, I couldn't even pick up a lunge whip without freaking Huey out, and now I can touch him with it and even drape the lash over his back, and he doesn't bat an eye. It's good medicine!