it was like the whole thing happened in slow motion with no feelings of panic, no emotional reaction, just numbness, like has happened when some previous trauma's occurred.
I know that feeling oh so well - it is more to do with hypervigilance than anything else, generally with me I've seen what is about to go wrong (people and their actions/reactions being so predictable) and I'm basically either en-route or already there. When my step-son was doing swimming lessons, I'd seen the teacher was expecting a little too much of them, some kids were just not up to what was being required, and I started moving toward where they were being released to swim back to the side at the deep end. As I got there (literally) one went down and looked like staying there, I just leaned down and grabbed him without missing a stride. It happened so quick no-one even freaked out or basically realised what almost happened. It's just one of those things, experience of shit going wrong is a major part of why hyper/vigilance isn't always a bad thing.