When your bunny does a flop it’s a sign that your bunny is utterly blissed out and content. It can appear surprising, even alarming to a human when a bunny throws itself into a flop but it is a wonderful thing. The bunny is happy beyond words. All it can do is flop!
Here is some footage I took in 2010 and 2011 on a little Sony Webbie HD video cam I used back then.
Be prepared for bunny cuteness.