I can just see it. The dog, after ridding himself, slowly looking up, appearing rather dazzed, just so slowly loosing his balance, and falling right through those shower curtain, and disappearing into the shower.
Duke his owner, walks in for a morning shower. "My God who upchucked?" He can also hear, behind the shower curtain, a painful moan, and the end of a black tail sticking out from under the shower curtain. The look on his face, is total horror, when he opens the curtain to see his favourite pet completely zapped in the shower. lol