Hi! Sorry to be so slow to reply, I spent a long weekend in DC with my daughter and haven't caught up reading the forum. That looked very scary, and I never watch any movies with suspense, like horror or thrillers, because I don't like that feeling of high anxiety that they cause. It kinda makes me ill. I can watch disturbing, depressing, amusing, but not scary.
Yes, I always wonder about getting hurt when I'm diving, but I think that's partly what keeps a diver safe, imagining what might happen and working to avoid it. At least those divers had a BCD on, eh? So they could float forever. Or at least whatever was left of them after the shark attack could float forever...