Shark with teething pain?
Strobe didn't work so found a willing elasmobranch to shake it?
Getting into tiburon dentistry and wanted some closeup bite shots?
Shark was jealous of attention a friend was getting and so fixed the situation?
Story at:
http://www.letsgodigital.org/html/re...rk-diving.html
Hope he doesn't swallow it, will play hell pooping out the xenon tube & batteries.