Morphine is great and all, and I imagine quite a few people picked up by ambulances are broken badly enough to need that kind of pain relief. Unfortunately, for some people, myself included, morphine (and even codeine) affects my mental thinking. And one thing I definitely want when I'm in an ambulance is to know what's going on, to be able to explain myself to the ambulance people, and when I get to hospital, to the doctors. So be sure to ask before giving someone morphine, they might not want it, or they'd rather suffer through a bit of pain but stay awake and alert. And it definitely affects some people a lot more than others.