My 2022 came home from helping with HS tryouts and there were two sets of (identical) twins trying out. Notable in itself. The the thing that blew his mind was the one set where both pitched and both had the same armslot and delivery. He said you couldn't tell the difference between the two of them other than one had slightly longer hair. But the movements were identical. Went on and on for 15 minutes about how "cool" it was. He never gets excited about younger kids, so this must have been exceptional. I think baseball-wise they were just average, so maybe easier to blend them.