It's call the Steadepod... The idea behind it you place a wire under your foot or attach it to your belt/pants, then lock it at a comfortable height and pull up on it. The tension the wire creates along with you pulling up creates added stability. When using smaller video cameras it makes it alot easier to capture smooth video and assists photographers when uses longer lenses.
At only $39.95 and as small as the memory card case in your kit, Its a must have for any enthusiast