>>19710801nta but before this he's laying flat with his arm out and down with the shoulder totally flat against the mat
then he moves his arm over to squeeze shelton and in doing so his shoulder flexes from the movement/motion and some of it lifts off the mat, enough for the ref to think he has to call it like a shoot
the ref does that little Slide My Hand Under Your Shoulder thing to visually say You Shoulder Was Up after, and does shove his hand in the space between his shoulder and the mat
speedball is used to tag matches where the rules literally don't apply so maybe that led to some confusion