(CNN) A doorbell camera captured the moment a snake attacked a man in a video that will make your skin crawl. Jerel Heywood was visiting Rodney Copeland's home on Sunday in Lawton, Oklahoma when the attack occurred. The snake was wrapped around a porch light, Copeland said. As Heywood opens the screen door, the snake pops into the corner of the camera and bites into Heywood's head before retreating.