Odd one this, but approx. @3am last night, as I was making my way home, I was pulling out of a junction to turn left, and I heard a huge wallop over the music I had going in the car. Didn't know what it was until I started to straighten the car, but a car had lost control going into an underpass(that goes under a huge roundabout), and whacked the metal railings in the middle of the road. Now I was on the slip road bit heading onto the island, and there's a similar metal rail between me and this car, so I pulled over on the right hand lane and put my hazards on. I wound my window down to see this car against the rail with only 3 wheels visible, and facing almost the wrong way blocking both lanes. The driver managed to open the door and stumble out with a cloud of smoke behind him, the airbags had fired off. I picked my phone up and dialed 999, then asked if he was ok?, he was obviously in shock and swearing etc., but he said he was fine in a panicky tone, so I followed up with, 'is there anyone else in the car?', he said no, he's on his own. So I asked him again if he was fine, he said yes, but the car is fooked!, and I asked him if he need an ambulance or for me to call the police? He was adamant he was fine, and I didn't need to call either, he will sort it out. Now it's 3am in the morning, I was a bit knackered, and the rain was starting to come down heavy, so I just closed my window and drove on. Couldn't help feel that I should have made the call or at least step out the car to double check him over, but the impression I got off him was to just leave him alone. Did I do the right thing? A few fellow motorists saw the car and reversed back to take the sliproad way, but no one else was interested to stop and ask questions, as it started to rain. And I couldn't help but keep thinking about it on the way home as the rain picked up. Edit: Forgot to add, as per the title of the thread, it's not the law to hang about right, like scene of the accident?