i second teh barge wake stuffing incident. I "stuffed" my scarab at low speed this summer 10-15mph Eveyone was fine just soaked!!! Granted if i was goign faster i probably would have gone over it becasue my bow woudl have been riding much higher if i was on plane. But they can come up out of nowhere. Big lumbering thing moving dirt slow with pretty much flat water adn all of a sudden comes a set of small vertical waves. Completely caught off gaurd.
But i must say the barge was actually a mobile dry dock for HUGE ship so it was pretty damn cool to check out, next time i will be looking for wakes instead though.