<human>: As I was driving home tonight, I was stopped at a light and  a big truck pulled up behind me. I have a low car so I'm used to adjusting my rearview mirror to keep other cars'  headlights from shining directly into my eyes. When I reached up to adjust it tonight, the guy behind me turned off his headlights off until we pulled away from the light. The unexpectedness of this wonderfully considerate act gave me this warm fuzzy feeling completely opposite of how I usually feel when I'm driving. So reddit: What are your considerate/nice/unexpected/otherwise good driver experiences?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I'm often super frustrated by annoying drivers, but tonight someone did something really unexpected and considerate. It was great.