I had a funny one yesterday. I was going along near Peckham, green light for me, red for the pedestrian (obviously!), and saw someone half way through crossing the road. I slowed and waved him through, but that wasn't good enough for him, he then shouted "You should be in the cycle lane". This bit of road has a cycle lane on the left, then an island, and then the main lane, and I was of course in the main lane as the cycle lane is dangerous IMO. My response, pointing at the red man: "It's a red light mate, you want to look before you cross the road", and of course he then cursed and swore at me to be in the cycle lane again. It had me chuckling for few hundred yards, especially when the bus driver rolled his eyes at me as if to say what a muppet!!! Then on the way back I made a mistake, passing a bus in the left hand lane, who was indicating right. I was in the right lane, and as he was just pulling away from a bus stop I wrongly assumed he was indicating to carry on straight in the left hand lane. Oops! A bit later at the giveway a hundred yards further on I apologised to him for not letting him in and explained my mistake. He was really chuffed, we had a cool brief chat before going on our ways. I love this sort of thing about cycling, you get to interact with the people around you far more than when in a car.