Anna was not pushing him down the slide, it just looks like it... She just really wanted to and is holding her hands away from him.
I was ready to rip him out of the water as soon as he hit. He LOVED it and cried when it was time to go in. He really kept going back for more. And yes, we do own swim diapers and swim trunks, but he was already wet... We can save those things for when we're out in public. HA!