Haha yeah awesome. I recently bought an air horn off of a semi that i want to mount on my truck
I have it connected to a empty propane cylinder. Fully charged it only good for about one good honk. But it's loud. Somebody did kid about me putting it on my bike.
Dan

 

IDRIDR - LMAO Wow, that train horn is what I was looking for! But I think that set-up might melt the charging system or just blow it clean off the bike.
PIAA horn is working great. Got cut off(surprise, surprise), hit the horn, and could immediately see the driver look in the rear view and the look of surprise that I was right behind them. Followed by the wave of apology. It's funny, the apology wave is usually all it takes for me not to be too mad about someone's carelessness with my life.
Then they flipped the rear view to night to block my new bright light. I didn't think it was much brighter, but holy crap it is! Got flashed a few times during full daylight. I might need to aim my light down and a little to the right.