 CONT: Caines skin becomes visible when it chars, for no reason  consistent with the other invisibility. Further, it drops off in an  impossible way (since theres no indication the invisibility  otherwise changes metabolism/healing). Caine acts far too healthy  for someone so severely burned. Finally, the extreme damage to skin  and muscles that this implies is not seen when he becomes visible.  (Even if the material flaking off is clothing, most of the arguments  still apply; burned clothing would adhere to burned skin, and would  provide little to no protection from the fire.)