12 feet? Burms can grow to almost 20 feet, I can attest to that. I've seen one right here in Australia that, in my estimation was about 18 feet, kept illegally of course, that could very -very- easily kill an adult human being. I was terrified of it, due to it's enormous size. It too was an albino with white, yellow and orange markings, and I actually handled it's tail while the "owner" and 3 of his mates were handling it. It's tail was so damned strong that my fingers were very sore after being wrapped in it's tail for a few minutes. I think a snake of that size could literally crush someone's bones if it wanted to with it's coils. Seriously. More likely though it will just collapse your chest cavity, you'll turn blue, die, and then it will decide that you're a little too big for a meal and just leave you there for some other poor unfortunate soul to find.