Very Cool! But i too have no idea how this got into my stream.. I made a fully working Technic hand when i was about 12-13, maybe even younger. I wasn't lucky enough to get the mindstorms stuff, but i made do with what i had. My hand wasn't as slender as this one, but it used the same small pneumatic system which had been around for just a few years and had rubber tipped fingers so it gripped better. It also had an adjustable thumb which could pivot (using a rack and pinion steering rig), allowing it to grasp at either the index finger or the ring ringer. It was pretty powerful too, and could slightly crush an empty aluminium can. I remember when my family had a garage sale, i foolishly put my lego out for sale with a crazy high price to see if anyone would actually buy it (about 40-50 litres of lego for $500). Nobody did buy it, but one guy stood there for about 10 minutes holding the hand i had made, starring at it, moving the fingers and basically looking at it like he had found a teminator hand or something. I'm pretty sure my hand inspired that man to create Cyberdyne Systems and one day, when his machines become self aware, I'll be Miles Dyson. Huh huh huh huh huh... click Boom!