Last year I was riding with a friend who was just starting to learn about riding in traffic.

We were on the right getting ready to turn right out of a rotary. I was in the lead. I gave a clear right turn signal. Just as I did, she suggested going another way. As she did, she gave a perfect left turn signal by pointing in the direction she was suggesting. I heard a little car tire squeal, and a beep. I don't know exactly what happened. But there was no crash. I think she learned her lesson. She was so upset we had to stop for a while. Not the fault of the rotary. Just scary.