I've seen small boats nearly flipped by sharks, whales, and dolphins, but never a grouper. Matter of fact, I've never seen a grouper sitting in water so shallow that its back is exposed. If it happens in the States, it's not often. Maybe this is more common in Australia where the video was shot. In a way, I'm more impressed with the grouper's location than the fact that it gave these blokes a good scare. You can read the story of the full encounter at the U.K.'s Mail Online. Have a great weekend, and try to stay upright.