So, since I was young I have imagined blades shooting out of my fingertips and feet. It's not a really big deal but it makes me uncomfortable, thus making me change the position of my feet and fingers so that if the blades where to actually come out I would not hurt anyone. Recently the feeling has gotten stronger. It makes me uncomfortable and when it occurs I can't get the uncomfortable feeling to go away unless I forget about the finger blade thingy. What is it I am experiencing?