Whilst most are entirely fictitious, bred form urban myths of payouts for nothing - always a " friend of a friend " .
Maybe a friend of a friend is leaving a job - and a precious vacancy.
The story of Mary is a tale told now as an urban legend - happening to a friend of a friend driving along an unnamed dark road near an unnamed cemetery.
The next time you hear the story of a friend of a friend who experienced something bizarre, you just might be hearing an urban legend.
You may have seen them in mall kiosks, at the beach and at town festivals, or you may have been to a party where a friend of a friend sparked your interest with their own airbrush tattoo kit, leading you to consider purchasing your own.