[martyup]

My 60s electric football game had a dial that would control the amplitude of the vibrations.  You could turn it up so high that all of the players would jitter so hard they would fall down.  The trick was to get the vibration set to the perfect level so the players moved forward without falling down.  It took far longer to set up a play than to execute it.  Imagine bowling where you had to reset your own pins.  It became boring very quickly.  Also, that little felt football was always falling out of the runner's arm.

[martyup]

My 60s electric football game had a dial that would control the amplitude of the vibrations.  You could turn it up so high that all of the players would jitter so hard they would fall down.  The trick was to get the vibration set to the perfect level so the players moved forward without falling down.  It took far longer to set up a play than to execute it.  Imagine bowling where you had to reset your own pins.  It became boring very quickly.  Also, that little felt football was always falling out of the runner's arm.