Omg!

BEAUHARNOIS, Que. (CP) - Police divers are searching for a Quebec woman sucked into the propeller of a ship while swimming in a lake southwest of Montreal.

http://cnews.canoe.ca/CNEWS/Canada/2007/07/29/4378739-cp.html?12724674f9a74c029e233b0254874d59

Now THERE’S an open water swimming hazard I don’t usually think about.