We went on Tom's boat quite a few years ago now - just a few of us, after we had all decided to go on a try dive with one of the dive boats and to a man (/woman) bottled it at the last minute. We made a hasty retreat from that boat and looked for one that was more beer and wine than air tank and wetsuit.
Having negotiated the price, and the drinks prices, we had a great day. Tom was good fun but the antics must have come later in his life as we were treated to no dramas at all. Maybe we didn't pay enough.