One single thing that makes you think "how good of you"

[Triumph Man]

As an opposite to the knob thread, surely there must be things that other drivers sometimes do on the road that make you think "how good of you". For example this evening, an old lady pulled in to let me by, and then pulled back out. We were in a village, I wasn't harrassing her or tailgating, I was following at a good distance. However, she must have thought that she would only hold me up if she stayed in front and and decided to pull in and then back out. How good of her.

[Triumph Man]

To add to the tale, I got from the village (Longbridge Deverill) to Warminster, and was half way through filling with fuel when I saw her go past the filling station, so she must have been going quite slowly!