I heard there is a gecko indigenous to Mayberry, NC that injects its lethal venom into the victim with a single bite. The venom supposedly results in instantaneous superhuman boosts in strength and vigor, as well as immunity from all known diseases. However, effects are temporary, and the long-term effect of the venom is that it instantaneously wears off at the victim's 86th birthday, and causes the victim to die painlessly in his/her sleep. There is no known antivenom.