I'll stop and ask a bicyclist standing atthe edge of a road or trail if they need any help. One time I saw a guy crossing a bridge and walking his bicycle ojn the sidewalk. When I stopped he said he'd had a flat tire but fixed it only to find that his pump was busted. I told him I'd pump it up for him. he was very grateful as it was late at night, there were no service stations anywhere near us and he had a long way to go. I think it's great to be able to help a fellow bicyclist.

Cheers