What is this - you stiffen your whole body, to have a vivid, motion picture sort of experience in your head of something that is satisfying, like artwork or washing on the line… You’re blocking everything else except for that one thing that gets the spotlight. Usually happens when excited about something in front of you. You stiffen the body, clench your jaw, hands could shake with stretched fingers if not tucked underarms.
I’ve always done this and remember being ridiculed as a child for it (so learned to tuck my shaking hands under my arms as it’s the biggest giveaway). I guess people perceived it as a form of stimming before we knew of stimming as such. It’s involuntary although able to hide better when grown up. It’s like my imagination’s hyper mode is switched on. Takes seconds, I guess. Not known neurodiversity.
Anyone ever experienced similar or am I just weird?