Tigga
Bogey Member
If you get close enough to a cottonmouth there is a good chance he may come after you. they're very aggressive and tend to charge verse flee the scene. Luckily I've only seen a few and never had any real run ins with those snakes.
I'm sorry man but this is a myth that has been debunked countless times over the years. I've seen at least 10 YouTube videos of the snake hunter/outdoors-men variety disproving it. None of them ever got a water moccasin/cotton mouth to do anything that even resembled "chasing" no matter what they did to entice it to do so. Like every other snake, they strike when threatened/cornered/stepped on, coil in defense if they have no escape, flee when they can and go on their merry way.
Trust me, I heard that growing up in Florida countless times and believed it myself when, like you, I hadn't come across any myself. I have though now, and never seen any such behavior.