The saddest thing

I saw a pigeon fall over while I was walking home from work today. It was weaving across the pavement in front of me, and seemed to trip, then fall on its side. After this little mishap, it recovered fairly quickly but it seemed so sad. The sight of this nearly made me cry, which with hindsight is rather strange - I don't like pigeons really, and I'm not the slightest bit pre-menstrual.