Wow! That's brilliant.
Years ago we were on holiday in New Quay, Wales, and my step dad had a tiny motor boat. We were pootling about, roughly half a mile from shore when a huge fin broke the surface not far away from us. At the time I remember bricking it because fins that big aren't meant to be breaking the surface off the coast of Wales (Jaws was still a fairly new film and I was about 8 years old). My step dad didn't seem bothered though and carried on pootling. We saw about four more fins before we headed back to shore.
It turned out they were basking sharks and I still remember it like it was yesterday. I've never come close to anything that big since.