I tap my fingers from pinkie to thumb and back whilst repeatedly counting 1,2,5,6,9,10,9,6,5,2,1,2,5,6,9,10,9,6,5,2,1 in my head. Usually to music and I have to finish on either a one or a ten. I also do this whilst grinding my teeth side to side instead of tapping. And as a passenger in a car I...