Back to belly in less than 3 seconds.
Not to mention her other various wigglings. Always having something in her hands, standing (held by the hands) and wiggling, sitting in her chair and squirming, writhing her way over every square inch of her crib.
Once she's up and running, she ain't gonna stop. Momma's gonna need a lot of running shoes to keep up with this one. And I couldn't be happier.