Train horns are made to be heard from miles away, and while they serve a potentially life saving service on trains the smaller versions people put on their vehicles are just there to annoy and get attention.
So builders who like to play with train horns try to make as much noise as possible with their creations, building larger and louder horns until they've constructed something so loud it should be illegal.
But this leaf blower-powered 55-gallon train horn built by Barrett Crook is well beyond illegally loud, like hear it booming in the next state loud!
-Via Laughing Squid
When that's not loud enough, the next step up is the people who build their own air raid sirens.
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