Right outside my office last night, just slid in front of a van full of workmen that were in the cycle box and hence had to go slightly uphill, went into my normal trackstand but just couldn't get balanced right. Nevertheless I felt sure I was fine, loads of pedestrians walking by and then I suddenly knew that I had gone from just not feeling my normal good balance to the point where I was going to lose it! Down I went! A nice girl asked me if I was okay as I managed to get my foot out of the pedal and struggle back to my foot. Luckily the lights changed and I just pegged it off and away.