In a great example of truth being stranger than fiction, this article came to my attention (via Confessions of an Idiosyncratic Mind, thanks Sarah)
For millenia women have found intriguing ways to knock off a no longer desired spouse, and this lady found a swimmingly good way of doing it.
Ohio Woman pleads guilty in over-exercising death.
I would never have come up with that idea, and its my job to dream up novel ways to knock people off. I can't be as evil as I think I am!
It also goes to show exercise can kill you, so I'm not going to risk it.