Get big bike back from bike repair man. Set out to do long commute on it without a test ride. Discover the seat is miles too high, and after a couple of miles decide I can't live with it and have to stop and bash it down a bit. Get it low "enough" but it is still too high, I'll have to do a proper job at lunchtime.
Commute is then enlivened by 1) a passenger shouting something at me - I assume connected with the fact that I'd been holding primary round a blind bend which has no overtaking lines on the road (anyone who abuses me on this section has justified my decision to take primary by implying that they would have tried to overtake if I had not) and 2) someone turning right from a side road onto the bit of road I was cycling on - a very loud "OIOIOIOIOI!" from me got them to stop, and I think it was a genuine "looked and failed to see" mistake as they then hung well back and did a good overtake when they did pass, as if they were a bit shaken.