There was an auto crash-test exhibition at the mall for several weeks. The focal point of the display was a machine with "THE SLAMMER!" written boldly on the side of a carnival-ride car that sat atop a tall track. This track ran down about 20 feet, diagonally, directly into a metal wall. There were seatbelts in the car, so that dummies could be placed inside to demonstrate the force of a collision.
After seeing THE SLAMMER, I assumed that when people went to jail (a.k.a. the slammer) they were forced to ride in this machine day in and day out.
A childhood belief about criminals

others believed things like this
- When I got my feet measured by the electronic machine, I thought that the machine will squash my feet!— Helen
- i used to believe that our ansering machine was the washing machine and that it could talk
— tamara - I used to believe that if the tyres were removed from a car, it would work perfectly on a railway track.— Anonymous Whistleblower
- I used to think that the laugh track on sitcoms were the camera men, directors, other actors, ect. laughing.Anon
- I used to think that a "carnival barker" was a person who barks like a dog at a carnival.Anon
- I used to believe the Wall Street Crash of 1929 was a literal car crashing into a bank.Anon