What's a Foamer?

[JLJ061]

Here is one personal experience I had with a foamer while I was filming at Metra's La Grange stop one time.

http://www.youtube.com/watch?v=Oa8QidoDH1w

[frikentrainnerd]

I think this is a perfect example of a foamer.

http://www.railroad.net/forums/viewtopi ... 53&t=69904