Gosh....looks pretty dangerous to me! One stone flying in your direction....I had the "pleasure" of going with a speedboat through the Everglades today. During the two hours trip I had tons of "bugs" being killed on my forehead, or so I thought. Turned out the bugs were pieces of grass that were cut off by the boat. Frankly that was not very pleasant, so imagining a stone could hit me, as in your situation would be probably a million times worse!