You borrow a dollar and draw a tiny pair of ink sunglasses over George's eyes. You cleanly showed both hands to be absolutely empty, then hold the bill by its extreme edge. There's a moment of silence...then suddenly the shades come to life! The drawing of the glasses visibly leap off George's eyes and up to his forehead! The astonishing animation of the cartoon shades happens in full view...with absolutely no cover of any kind! The borrowed bill is immeidately handed back for examination...the shades are indeed permanently inked onto George's furrowed brow.