Heart in Mouth

This morning, as I was driving to work, I heard a police car coming up behind me. The whole queue of traffic pulled over to the left to let the vehicle through and I was pleasantly surprised to see the message 'Thank You' being flashed on the LED screen in the rear windscreen. 'Nice touch' I thought.

A few moments later, a car stopped about four cars in front of me, indicating to turn right. I glanced in my mirror and saw a bike coming up the outside of the traffic and he didn't appear to be slowing down. The car turned right, the bike slammed on, I held my breath and was relieved when the bike did actually manage to stop under control, about 2 feet away from the car.

Observation. It's a very useful technique, better used well in advance...