Put a coin on the track...

When I would hear the diesel horns of SP SD's and GP's on The San Diego
and Arizona Eastern in 1963/64 on K St. in Chula Vista, CA, I would place
a penny on the tracks and Michael and Jimmy would say the train is going
to derail. Well, it didn't and the smashed coins were fun to collect. Watching those consists as a kid made me a fan of the bloody noses.