Out at assateague about two years ago I had one come up with 4 feet of me. Scared the living sh*t outta me. Had no idea what it was just this big grey thing coming up from the deep. It was one the freakiest expiriences of my life.
If any of you guys know about the penn and teller show called bullsh*t on showtime, they have an episode about "dolphinatics" it is f'n hysterical. Check it out on youtube.