They somehow move quickly across the floor without any bumps or a sense of vertigo.The Steadicam is a lightweight, hand-held stabilizer that gives camera operators a steady hand when on the move to capture shots like Sylvester Stallone's character, Rocky, running up the steps of the Philadelphia Museum of Art."You have to be willing to look fairly goofy and silly when you're testing prototypes for machines that work with humans."He began marketing them at health care conventions, AARP conferences, anywhere he could reach people with limited mobility."I was looking at a video report of Pope Francis struggling with mobility," Brown said."