I think the point that everyone is trying to make is that it sounds like you caused more trauma to the pinky than necessary, seeing as how the pinky would not harm the snake, and the snakes form of killing is less damaging than flicking.
Being concerned is an awesome thing, and I applaud you for it, but I think the matter in which you dispatched the pinky was unnecessary.
Think of it this way. I'd rather die from lack of oxygen than traumatic brain injury.
Good for you for caring though. Not many people do.