 During the growing beard shot, the ears on the Xyrophobes  prosthetic head belong to Matt Damon (qv). Dan Martin, who carried  out all prosthetics and FX, was working at Artem, who had just  completed _Brothers Grim, The (2005)_ , starring Matt Damon. Needing  ears for the puppet and in a hurry, they were "borrowed" from a life  cast of Matt.