My grandfather and his grandfather inadvertently did a similar number with a huge tree stump back in the 30s. The younger man had been summoned by the elder one to provide the physical labor, digging out a small chamber under the stump and chopping away at the major roots anchoring the stump, while his grandfather, who had handled explosives in the nearby coal mines, prepared the dynamite charge. After they were all set up, the older gentleman twice decided to add just a little more to the charge - just to be sure, mind you. By the time they were ready, they had attracted quite a crowd of neighbors surrounding the old man's big back yard. They lit the fuse and waited, making sure everyone stayed well back. When it blew, it really blew, sending the stump hundreds of feet, over the old man's house, across the street, over my grandfather's house, and down to the bottom on his terraced back yard. My grandfather's main concern afterwards had been how close the stump had landed to the new stone barbeque he had just finished, dreading my grandmother's probable reaction. The incident became a favorite story often told by my mom, my uncle, and my very numerous older cousins. The two gentlemen involved achieved a certain amount of undesired notoriety for their achievement.
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