For many years I frequented the Anvil Arms, at Wold Newton, in East Yorkshire. There was an anvil on a stump by the front door, and if you could carry it round the pub, you got a free pint! I once managed to carry it into the bar and set it on a table. I would guess it was 1-1/2cwt or maybe even 2cwt. I only saw one guy ever do it, he was called Rocky Barnard!