But sometimes once is just not enough. As soon as he's at the bottom, Milo decides he wants to go again. Watch as he gets right back in line with all the kids!

"Gotta get right back up to the top ... "

Milo's got the whole system figured out ... so good luck getting him away from the waterslide now!

Check out the whole video here.

And here are some other pups who've figured out adorable ways to stay cool in the summer heat.