Oh yeah I done did this before..
I have a few quirks one specifically is something that is not really something you would want to know so Ill say a different one instead, I can/use to be able to stare at something and make my eyes sort of vibrate or move side to side fast, another is if I stare at an area long enough like a wooden wall for instance the dominate color of the wall (Brown) will completely cover me vision for a split second and all I can see is brown until i move or blink.
Oh Yeah definitely do this thats why my hand is full of ink because I fiddle with my pen.