I always open and close my hand several times near my windscreen and then when I look in my rear-view mirror I often see the break lights come on after a short while (probably after they figure out what I was doing
), I learnt to do this when my family went across France and a biker did the same to my family and saved us a ticket. In my 5+ years of driving though I've only ever had 2 other people return the favour. Does anyone here warn others, and if so, how do you do it?
