1.

You swerve to one side to let him pass.

2.

The most striking feature of such encounters is how rarely they occur.

3.

We are extremely good at walking, which is just as well.

4.

To do otherwise is considered rude or even provocative.

5.

We alter our pace or even cross the road rather than risk having our behaviour misinterpreted.

6.

We disguise our error by stopping to gaze in a shop window whose contents are of no interest to us.

We disguise our error by stopping to gaze in a shop window whose contents do

7.

It appears that men and women adopt quite different strategies to avoid collisions.

8.

Many of us will hesitate to set foot outside our front doors for fear of violating the rules.

Many of us will hesitate to set foot outside our front doors in case