Seen that before, highly doubt that it is as heavy as they claim. I got pictures on my phone last fall with a guy claiming he shot a #250 lb wolf near Darby, it was probably 1/2 of that. It is like a mystical 430"+ bull elk, probably one out there but even if you wander the woods for the rest of your life you will probably never see one that big.
Rule #1. Don't believe everything you see on the internet.