^ Yeah, that's what she said. Then Lex replied, "Are you sure
As for the piano, wouldn't it be safe to assume that it was also nailed down like everything else to prevent it from moving around on the high seas? A simple lurch of the yacht wouldn't have shot the piano across the room at such a high rate of speed (not to mention exactly where it needed to go, nor at the precise second it needed to). To me, it's pretty obvious Jason did the deed.