I had my first commuting accident today. I was heading home, coming up through Kentish Town towards Archway and I had just travelled over a traffic light and was coming up to another where I turn right. I was concerned about a car that was travelling behind me (and whether they were going to leave me enough space in the lane) but spent a little too long checking them out - when I looked forward again I realised that: a) The van in front of me was about 3-4 metres away. The van in front of me was stationary. I was not. I slammed on the brakes, but it wasn't enough and I hit the back of the van. My back wheel went up and my helmet bumped into the rear of the van, and my groin went forward into the handlebar stem . Luckily, I was fine apart from that annoying 'hit in the nads' feeling, and a feeling of embarrassment. The bus driver to my left seemed to think it was pretty funny after I gave him my best comedy 'I've just been kicked in the balls' expression and made some joke about being in the circus. The lady in the car I'd been worried about pulled up aside next to ask me if I was all right . Anyway - bike seems fine, after about half a mile the family jewels felt fine, and the helmet has no visible (new) marks on it. For an accident, I'm pleased that I got away that lightly, but I guess I need to think about how I can stop it happening again!