I'm starting to sense a pattern here. I think you need to leave the child on the slide; you won't get shocked, and he'll learn that if he sits and revels, he gets pummeled, which in turn will lead to him not sitting and reveling.

Unless, that is, there's some kind of congenital learning defect at play here. I mean, if you can't learn not to do something that causes you pain, maybe Mac can't either. I mean, rats in mazes learn that if they get shocked doing something, they should stop doing it, right?

:P