Cats are so Funny When Playing (video)

It's time for more cat videos.  Ho-hum, you think?  No way.  This video is too cute not to watch.

Cats are so much fun to watch as they play, but haven't you wondered what is going on.  They're wacky when running around.  I wonder if they are afraid of what they're playing with.  Take a look.

(vimeo)