Imagine if you did nothing and there was a death. You would regret it for the rest of your days. Professional rescue and health care organisations are trained and used to taking the safest options. If the guy got out ok; so be it and he may think it was an 'over-reaction', but given all your info, you did the right thing. It's kind of like when some one collapses on a busy street and everyone just walks right by. There is no shame in trying to help.