Every once in awhile you run into a 'kicks and giggles' shot at a traditional 3D shoot. Couple of years ago, they had one target where you had to shoot your bow opposite handed. Right handers shot lefty, lefties shot righty. Everyone else in my group was trying to rest the arrow on their thumb on the opposite side of the bow and generally screwing up. It was pretty funny.
I, on the other hand, had just read an article in Traditional Bowhunter about thumb rings. So, throwing caution to the winds

, Iusedthe Asianthumb release because it let me keep the arrow on the shelf.I was the only shooter that day that managed a 10on that target. After that shoot, I came home and made myself a couple of leather thumb rings and started playing around with it some. Never got very serious about itbut it's a pretty cool technique to know.