things i've learned while cycling

most people cannot judge the speed of a bicycle. or they think because you're not a car it won't hurt if you hit them at 35km/h. or that they, as pedestrians, have right of way on the road.
following on from the above, some parents care not for the safety of their children, crossing the road with them in buggies, or allowing them to wander into the road because it's just a bike coming.
it may be the most efficient form of transport humans have ever invented but it's hard work.
% of terrible drivers is probably quite similar to % of terrible cyclists.
pushing yourself to the limit is probably tougher mentally than physically.
i am very unfit.