Our family has done this for years at Christmas, New Years and sometimes July 4th. We have never used that much powder for each explosion but we do have fun. We build a fire, use a long pole with a wire wrapped around the end to set off the black powder. One anvil is buried in the ground the powder is added to a hole in the top of the buried anvil, the other anvil is placed on top. The younger generations are always the most fun because they cannot believe this can be done.
