Has anyone heard anything about the" Ear Cannon"air horn sold by Aero Stich?

 

I'm not sure of the brand, but one of my riding buddies has an air horn set up on his Road King that about makes me crap my pants when he blasts it behind me. I laugh when he scares the rest of the group though and it really grabs the attention of cagers. At least he is conservative with it's use.