Yoga before sleeping?

I have a tendency to do a little bit of yoga pose (as Daddy calls it) before sleeping every night. Somehow I have difficulty sleeping, and will start to lift up my back when it comes to sleeping time. Mommy has been observing me doing this since I'm small but didn't get a chance to take a photo of it until now. It started with this...

and after a few practice, I can finally do a somersault!

A feeling of triumph!