I was descending a fire road on my mountain bike and there was a couple on bikes climbing and they were arguing about something. I noticed they only had 1 bottle between them. I got to the bottom and climbing back up I found the guy lying on his back in the middle of the road. I had lots of water (it was hot) and I gave him some and he got up and seemed to be ok so I took off and eventually caught up to his wife/girlfriend, she had their water, and I told her that the guy was hurting back there. She said something like, "He'll be ok". Great, see ya.