I always do a "lifesaver" look over my right shoulder (if in Europe then it is a look over my left shoulder) - better than any mirror. I got into the habit years ago and do it whist driving too.
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You will have to do without pocket handkerchiefs, and a great many other things, before we reach our journey's end, Bilbo Baggins. You were born to the rolling hills and little rivers of the Shire, but home is now behind you. The world is ahead.
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