If I put my palms to my closed eyes, and move my thumbs at the sides of my head, I can 'see' my thumbs as shadows against a grey background. Probably just a ves

If I put my palms to my closed eyes, and move my thumbs at the sides of my head, I can 'see' my thumbs as shadows against a grey background. Probably just a vestige of hand-eye coordination that my brain invents. Anyone else get this?