I was pushing up a privet hedgerow on a D4 back in 2000. Had some old concrete dairy feed troughs in it. I went to push them up and kinda flipped one up. They're kinda concaved underneath. When I flipped it was a bed of cottonmouths up under it. Snakes went everywhere. It was an open cab dozier and I hauled butt in reverse fast as I could. Felt like I was gonna get bit from all directions.