Sounds like you did what you could to help the guy be safe, and luckily things turned out okay.

Out of curiosity, which mountain was this? I stayed in Bad Aussee for a week in 2015 and did some hiking around there. Mainly down in the valleys and around the lakes because it was rainy and foggy most of the time, though. Couldn't even see most of the mountains, but in the rare moments the sun popped out, wow! It's a gorgeous area.