The Swinging Gym was a dangerous ride for the operator. You could slip into the "pit" under the cage and fall under the cage when it was coming down in the swing motion and get killed.
To get the swinging action started from a dead stop when the patrons get in, the operator pulled the cage towards him and let go to start the ride.
If you made the mistake of pushing the cage away from you, the cage weight will pull you into the "pit" and then before you can get out of the way, the cage comes back at you and amputates your leg, or worse, you fall in and get crushed under the cage in the "pit".
I'm glad I never had an accident on one, and I'm glad they're mostly gone from this world.
Please do not exit the ride until it comes to a complete stop.