A mental that leads to an unnatural or normal physical symptom I think. When there is ANY doubt if my mind thinks maybe I shouldn't say this, normally people could still say it, maybe nervously, but a physical reaction doesn't stop them yet with me I noticed I have a physical tightness somewhere enough to stop my vocals even as I am trying to say it, it's like my subconscious worry is physically stopping me. There's more too it, excitement can get me stuttering, worry, even a slight worry, but I find it so fascinating that how I feel in the moment dictates a physical reaction that's strong enough to stop me from talking like my body is afraid to scare the lion even though I am trying to say it anyway. The reason I think this and it feels this way to me is because I can say those words a thousand times over at home or in other situations potentially and yet in one moment of fear or excitement or doubt...all of a sudden I can't??