Sometimes the digital effects are not necessary, even when they are expected. For the scene where Joe Morton suffers a fatal seizure, the crew used an under-crank shooting technique, to speed up the movements of Morton's character, coupled with Morton's own shaking. In "Precipice", John Wash assisted the digital effects team when the production crew was filming a scene that was going to involve Clark X-raying a car with a group of teenagers in it. To achieve the effect of Clark X-raying a SUV, John Wash had all the actors in the SUV sit on apple boxes to get them at the representative height they would be in the SUV. The actors then went through all the motions they needed in order to "sell the X-ray effect". For season two, John Wash added prosthetic veins to Welling's hands, which would move when he moved, to help simulate the kryptonite poisoning his character would undergo. Then, in post-production, Entity FX would add a green hue to them, and digitally hide the prosthetics when Clark was not affected by the kryptonite; in the first season, there were no physical prosthetics and all effects were done digitally.