Locomotion. Backward.

So she's pushing herself up onto her hands and knees now. She'll rock back and forth, trying to propel herself forward. Then her little knees slip out from under her as she pushes. And she ends up pushing herself backward. She gets up on her hands and knees again and repeats the process. She ends up pretty far from her starting point but frustrated because she's usually aiming at a toy or two. She'll be crawling forward soon enough.