The thing about running downhill in ANY footwear is, if you're not gonna let yourself completely go with gravity and just fly down that hill (which can be risky if the hill is steep), then there will be a braking mechanism at work with each footstrike. Now since Invisible Shoes are so minimal that they prohibit a heelstrike, the forefoot will bear the brunt of that tendency to brake, especially if there is overstriding involved. This would also cause excessive forward foot movement against the sole and toe lace with each footstrike, causing friction and engaging the toes in an attempt to regain control. But I guess the big danger in involving the forefoot in the braking process is the risk of injury to the bones of the forefoot. I have found it helpful to discourage overstriding by increasing cadence, taking shorter quicker steps. The foot should reach its furthest extent forward *before* it touches the ground. This way, it is already moving backwards so that when it lands it is moving under the body at just about the same speed as the ground itself — like a well-executed space docking. OK, maybe that's too much thinking. Basically on any significant downhill I just take shorter quicker steps and use my ears to tune my form. Whenever I'm sloppy with my downhills — running with a noisy slapping stride — I usually feel it in my feet that night and in the morning.