Btw, I feel ya on the cost thing... the only reason Jackson gets chances to swim is because of my family members w/ pools. We have an aquatic facility near us and it's sooo expensive. I always think about going in the winter time but then don't want to pony up the money. But it is such great exercise and good for their joints too.
When Jackson is REALLY pumped up and excited, he will jump in and do his BIG dives like this one, which I think you've seen:
https://www.youtube.com/watch?v=YMV2VrK2Q7k
But most of the time, he does his jumping onto the raft first. LOL
https://instagram.com/p/4CvuVfPBhE/?...on_object_map=
We did dock diving once to practice but couldn't get him off the dock. He liked the ramp a lot tho.
https://www.youtube.com/watch?v=tUD4ZNDubaI Again I can't get myself to spend the money when we can swim for free! lol. So we never tried it again.