Just simply playing in the browser. I was clicking on the toilet and toilet paper when the browser slowed down with a stutter as you may expect browsers to do every now and then. And as the lag was clearing, I saw it split into multiples in doing the animations.
All cats behind earlier cats could not move into where their future cats were.
I ended up playing around with them a bit and found that the future cats, when looping back from fear of the kitchen sink melded into the other cat waiting at the back of the queue.
