There I was, snorkeling about fifty feet from the sloop anchored in a snug little harbor off Peter Island. Had my face in the water, heading toward the boat. I heard the people on the boat yelling something so I swam closer. About ten feet from the boat, suddenly I found myself being stared down by a eighteen-foot barracuda (maybe six-foot, but still pretty big). I started back in a hurry, to the great amusement of the people on the boat. The 'cuda swam off and I climbed up the dive latter. Turns out they were telling me not to chase the barracuda.
What's your "so there I was" story?