@Wending's grandparents operated a farm on a large parcel of land in upstate NY. They decided to build a pond of significant size. There was already water flowing through a swampy area. This was in, maybe, 1960. They had done all the design pre-work. (Grandma was a civil engineer. Truth.) One day they had placed a bunch of charges as part of the initial prep work. Grandma was entertaining friends on the front porch overlooking the pond site. Grandpa had taken a dislike to one of the friends. So he handed her a device the size of a box of kitchen matches, with a switch on it. " Go ahead, try it," he said. BOOM. Mud rained down on the universe. Legend has it that the friend never visited again, and Grandma was secretly glad.