The hidden danger of flopping.

Simon discovered how much fun it is to flop on the purple towel.

And it really was all fun and games until...

Simon discovered the perils of not having enough momentum.  He got stuck on his back like a little fuzzy turtle.  He tranced himself for a few seconds until gravity took over.
Sadly, being deaf, River didn't hear his cries for help and probably assumed that he had done that on purpose.  Gravity took over before I could get to him and nudge him to one side.  Poor little guy became a bit traumatized by that incident and hasn't flopped on the purple towel since.