[Bill Douglas]

If you think someone is following you. Not a guns out situation, more of a "come back later and burgle the rich man's house" sort of situation. On the motorway drive in the fast lane then (with big margins and safely) cut across the traffic in the slow lane and take the offramp. This way the guy following can't make it in front of and across the traffic too to take the offramp. also approach a stop or give way intersection. Wait until some cars are coming, then with margins again!, cut in front of them and drive off.

Now, if you are out to get someone. Follow them on a twisty road with a steep bank down one side. Don't ram them, but rather love tap them then get on the gas so you are pushing them. Point of impact being 75% of the way across the car to wards the middle of the road. They will put on the brakes, loose control and go down the bank.