Bones

Goof: The 3D-printer Angela uses to create a 3-dimensional replica of the skeleton raises the already created print out of the plastic-liquid. In this way, the print is in the way of the lasers. Actually, the lasers heat and solidify the plastic point-by-point just below the liquid's surface. The print is then sunk by bit to enable the print of the next layer, allowing the lasers to reach their focus-points without being disturbed by already printed parts. The print-process normally takes a whole night for an print-object of the size of the skeleton, not just a few moment as suggested in this episode. Also, the lasers used for 3D-printing operate at a wave-length not perceptible for humans (they are invisible to humans), and due to their dangerous nature, are being operated either in closed rooms or behind a special orange glass which prevents the laser-beams from exiting the work-area.