Question: The Boomershoot is a long range precision rifle event held near which city in Idaho, in recent years, the event has also featured an explosive fireball and an Anvil firing to start the event and entertain the participants?
Sentence (from "Anvil firing"): Anvil firing (also known in the USA as an "anvil launching" or an "anvil shooting") in the USA is the practice of firing an anvil into the air with gunpowder.
Relevant evidence: Yes