Current Status: Can't even....
A friend has a cat who will briefly chase a toy before flopping over in a similar manner.
My cat does this. At the first sign of difficulty he just flops over and quits.
I posted this one up because it vaguely reminded me of what my recently deceased Lily would do, just for attention. If she wanted you to, say, fill her bowl, she would trot herself down the hall towards the room the food bowl was in. Reaching the doorway, she would drop on her side just like the kitten, except she would do this tiny 'mew!' as she flopped over, like a Looney Tunes cartoon, then wait for you to oblige her.