Yeah - that's what we figure too. ;~)
But it startled us, and we said "was that a train?"
Back in high school I heard about a kid (I forget where) that put an old air foghorn from a state ferry in his car.
Fun could be had.
Say, can you guys get to: http://www.wunderground.com/ ?
Especially since they were approaching as they laid on the horn for a loonnnnng blast. Really sounded like an approaching train.
I was wonderin’ if I should get up and run...