A thank you note on my windscreen
Some years ago I was working at a conference, and at the end of the day, tired, sore feet, dragging myself to my car, I found a heart shaped post-it note with a small bag of Haribos on my windscreen with a sweet, sweet thank you note. My sore feet and tiredness were forgotten! I was so touched. To this day I don't know who left the note, and I'll always remember it with a huge smile on my face.