I was messin' around with a snorkel down in key west two years ago when I was down at the worlds...just surfacing, grabbing some air and diving down...go a little further out then do it again. Well I dove down in about 12-15 ft of water and all of a sudden this sand shark (didn't know what it was at the time) appears directly below me. I'm not used to seeing that type of $hit nor was I expecting it. Basically I freaked out and went flapping uncontrollably back to shore where a couple on the beach were looking at me like I was on fire. LOL. The thing was probably only 3 1/2 to 4 ft long but boy oh boy did it catch me off guard!
Now, had I come across something that big I would have $hit my pants!