My uncle hated ground hogs, running battle for years. I was helping him one day when he got the idea of connecting the tractor's exhaust to the ground hog hole using my aunt's vacuum cleaner hose to "gas" the bastards. After about 3 minutes, the hose completely melted. As we stood there looking at the mess, I heard my uncle say "Don't tell your aunt!!". Ground hogs survived the onslaught unlike the hose.