The conditions are not bad. The water's just a little cool. We went in a circular rope pattern, and all I hit today was a couple of stumps and two or three trees, but other than that, it's a clean bottom.

The pattern in which photons are blocked or not blocked had never really been computed. In the laboratory, we were able to construct a device that was effectively like doing a computer simulation to see the patterns of transmission.

It's not that spectacular conditions.

I tied the rope around me and called up, if somebody had a cell phone, to call my sister and tell her I was OK. I didn't want her hearing about it on the news. We're very close.

I think you have everyone kind of pulling on the same end of the rope. It's not like you're Robin Williams and everyone else is a deaf mute. It's like - there's plenty of help.

This was a scary and rare occurrence, not a pattern.