LOL! To me it just looks like she's surfing. She got 2 huge bags of ball pit balls for her birthday along with what we thought was a tent with a bottom to keep them in (and play in), but it had no bottom! So we had flipped it over & let her play in it upside down. So.. new ball pit bought for Christmas, turns out it's so shallow it barely fits one bag of balls.
I can't resist saying that it looks like she's having a ball. I like the tilt and the expression on her face as well as the bright colors in this one.
ETA, the popped up hair, maybe static? is a smile too.