Rattlesnakes are very dangerous venomous reptiles. Their poisonous bite can destroys tissues to cause crippling paralysis leading to death if proper antidotes are not given immediately.
Rattlesnake has one more very dangerous behavior. If you decapitate its head entirely from its body, still the snake remains very active for 1 hour, before it dies. During the time, the chopped head of the predator can see, move and bite to deliver a fatal dose of poison.
This behavior of rattlesnakes was featured in National Geographic Channel when Thomas Scott of Santa Cruz (California) beheaded completely the deadly snake when he found it in his garage. The head kept on scanning throughout the garage like a zombie. It moved and looked throughout to find a victim to attack with its bared deadly long fangs.