The Lionel layout at the JRM Museum at the Arkansas and Missouri Railroad sports a ten foot long bump and go line:
Every so often, I get a wisenheimer visitor ask if the people in the trolley don't get whiplash, so I addressed the issue in typical MMM style:
The layout features operating accessories for the kiddies.
Working air whistle in the station:
Crossing gate and semaphore:
Manual crossbuck and bell, wired to flash when the button is pressed and released:
And, of course, the star of the show, "Little B****rd":
L.B. got his name when a co-worker pressed the button. She proceeded to jump back about two feet and said, "OH! You little B****RD!!!" Not sure if she meant the gateman or me... 
We conclude this tour with a brief video of the left -hand billboard:
Mitch
