I remember finding my grandmothers blood pressure cuff and about cutting of the circulation to my arm. She had to teach me how to use it properly XD..she was a nurse so things like that were always lying around.
also, i really like the way you do coloring with pencils. you know how when people use color pencils, and they make the colors uneven as the over lap? you don't do that. everything is even, with the right touches of shadows and light. good work.