As vague as that is, I think it does apply for some. As a kid I stuttered a lot. Not blocks, but stuttering like m-m-m-m-m etc etc. When I was 17 or so it almost totally went away. Sometime when I was in the army it came back. Now though, I don't have issues with the m-m-m-m stuttering. Now it's blocks where I physically have issues getting the sounds out. It's like i stop breathing when tryin to.