It takes a special kind of stupid to be running 150 mph in the fog.
The buoy could just as easily been a small boat with people in it.

http://gcaptain.com/on-board-footage-shows-speedboat-hit-marker-buoy-at-150-mph/#.VfLe-5cuM5s

http://www.newsday.com/long-island/stuart-hayim-powerboat-racer-crashes-off-long-island-in-bid-to-break-record-1.10811874