My fixed gear after arrival home last thursday:
This summer I bought one but didn't know better than tie it entirely behind the saddle, at some point causing the bikes front to disengage the ground when riding up a bridge - I had to hang entirely forward to prevent the bike topping backwards. Since I learnt a better way: diagonally, so that I can balance the weight between front and rear. I first thought I had 30 kg with it, but it was 40.