Which Olympic Sport Would Be Most Likely To Literally Kill You?

I’m watching water polo right now, and it was maybe 20 minutes into the match, as the players yet again swam from one end of the pool to another on a change of possession, that I realized I would just give up then and there. I’m a fine enough swimmer, but it’s exhausting just to toss around a frisbee in ocean water too deep to stand in. Water polo, which is a brutally physical sport in ways we can’t even see on TV, is my death warrant. I would sink to the bottom and die and I would welcome the oblivion.

So: Which Olympic sport, if you were forced to compete right now, would kill you, and how?