I was pedalling the recyling centre's Maximus trike back to it's lockup container (hard going after 7 hours riding it round and emptying recycling boxes), and a guy riding his BSO on the bike path behind me was shouting "pedal harder mate, pedal harder, go on mate...."
Until he came past, looked back and realised I was a girl. At which point, he grinned, waved his bottle of White Lightning at me and said "Oh, sorry!" Which actually made me smile...