if you're worried about that sort of thing happening again, you might consider taking a first aid course. that's what holds me together when someone gets hurt - knowing what needs to be done, knowing a list of steps to follow. for me at least, i can shove my panic into a cupboard long enough to get through, then when everything is okay, *then* i let myself fall apart. even if all you're doing is standing watching someone else do it, the training you've been through lets you know that things are properly being taken care of, and that helps keep panic under control. mind you, this won't work for everyone, and for me it only works for real emergencies (most of the time). something like my dog getting loose and going missing, i'm toast.