Wowee - I sympathise, that must have been a hell of shock.

Something similar happened to me last week. I was eating a sandwich and noticed some movement out of the corner of my eye. It was a F****** Velociraptor ......... they have a nasty bite and once you get one nearby, you know that there are more around.

I inserted a photo of it, just in case you don't have velociraptors where you are.