My son is 11, he rides his bike to school (he used to walk) but he has passed that Bikeability thing and so I said he can ride.
On Friday, he rode his bike to school and his chain had come off and this was right outside a parade of shops (quite busy during the morning). He slipped on the curb (he looked down at wire). A man came over to help him put it back on (really kind of him) and he went off to school. He waited outside school for friend (like every morning) and the the man said he was just checking he got to school okay.
When I collected him on after school (I collected him on a Friday as he can't ride with his PE kit, so he rides home and I walk dog and carry PE kit). He was there again and came up to me and explained what happened and asked if I needed him to watch out for him in the mornings. I think he is probably just being nice, isn't he? I just don't know why I feels the need to follow him.