It feels bad telling a friend they were wrong, but do it anyway since you care about them. They might not make the same mistake again. I'm currently trying to convince my friend to get a helmet and lights, as he took a car's right of way and got hit in the dark and rain. Luckily he was okay. He rides a lot and I got him into it, so I feel responsible. We mostly used to ride together, but since I left town I can't ride with him. These cars will kill us sooner or later if we don't stick together.