miscellaneous rambling

We saw two manta rays swimming in Koh Bon. These creatures are about 5 meters from wingtip to wingtip ( 16 feet). Massive things, that move silently through the water. You couldn't hear one if it passed right by you. Scary thought, but these guys are harmless to humans. They are super manueverable. If they come toward you, I was told to just stay still, as it will simply swoop up over you as it comes near. Of course, it is different when it's only your second day on the trip, and this giagantic thing comes swooping past you. You try to tell yourself that there is nothing to worry about- but inside I was thinking "please move up now!! Don't run into me".
As I saw it coming, I was thinking Steve Erwin, Crocodile hunter.. but that was a stingray, not a manta.