Ultimate bicycle horn

Do you ever find yourself wishing you had a nice, loud horn to wake up a zombie driver?  Hardly a day goes by, that I wouldn't put one to good use!  (I've got a sweet squealing after-market air horn on the motorcycle that does the job quite nicely.)

The "Hornster" is definitely overkill, for a bike.  But it's pretty awesome.  Dude took a train horn and mated it with a scuba tank for compressed air supply.  (I know what you're saying... "Why didn't I think of that?!!"  Yeah, I'm kickin' myself, too!)

The sad reality is... it's a little impractical.  The gear is both heavy and bulky.  The horn-equipped bike can be had for a mere $8000.  Read about it HERE.  (Check out the video clip.  You may notice, like I did, that the rider has some protective earmuffs on.  Good idea.)