See ya later, Alligator

I remember at one of my grade schools, there was this one set of monkey bars on the playground where we would climb up one side, then hang on the rungs of this sort of horizontal ladder and work hand over hand to the other side. We would always say there were a hundred alligators below that would get you if you let go. It wasn't all that difficult to get across except that some of the rungs would spin around and make it really hard to hang on. This was especially so if you forgot which ones were loose and got surprised by it. Lately I've been having sensations that feel very similar. And so, I suppose, the memory came to mind for the first time in about forty years.