As I made my (hurried) way around Oxford a woman was whistling (as I had been earlier) that cliche song "Walking in a Winter Wonderland". This was near the Bodelian. As she stopped I picked it up (across a busy square now) and then I stopped and she continued. I started to laugh and had to shout out "I'm laughing too much to finish it off". People were great that day, courteously getting out the way, smiling and most talkative.