Looking for video clips of air horns

Am looking for some video clips of motor vehicles with air horns on them. The one in particular I am
thinking of showed several vehicles gathered in valley somewhere between some hills, and they would
run up the valley sounding the horns. Not interested in any of those idiots running around in the city
trying to scare pedestrians. I think there are some clubs dedicated to this and would appreciate any
links. Thanks for the help.

Try this:

http://www.youtube.com/watch?v=Uubfn7Qv9vU


This guy, Ed Kaspriske, posts videos like that all the time. Subscribe to his YouTube channel and you'll be notified when new videos are uploaded.

Also, here is a video taken at the world's (or at least America's) largest gathering of locomotive horn collectors:

http://www.youtube.com/watch?v=NBityRsiJdI