Steve was in the middle of a diaper change on the ottoman (I think that's what you'd call it) when he yelled for me to come into the room.
Here's what was going on:
She's rolling herself over from her back to her side. Makes perfect sense in regards to the "couch incident" since she was laying on her back on the couch and a minute later was laying on her tummy on the floor.
Note: You can also see how much hair she actally has. Too bad it's only on half of her head - it all fell out around the front so in most of her pictures she looks bald.