Today is Friday 13th, dubbed the unluckiest day in the calendar. And if you're superstitious, looking at the date might be enough to make you hide under your duvet until tomorrow.
There have already been three Friday 13ths this year; in February, March, and May.
The fear of Friday 13th is called "friggatriskaidekaphobia", which combines a fear of Fridays with the perception that number 13 is particularly unlucky.
Some say it's comes from the Bible. For example, Judas Iscariot, the apostle who betrayed Jesus, was described as "the 13th guest" at the Last Supper.
Others believe it's linked to Norse mythology, which tells how Loke, the demigod of mischief, turned up uninvited, joining 12 others and taking their number to 13.
But whatever the reason, Friday 13th is considered one unlucky date. These 13 tales of terrible luck and horror may help you understand why...
1) A bus conductor has a run of serious bad luck...
Retired bus conductor Bob Renphrey of North Wales decided to spend every Friday 13th in bed after a run of bad luck on the fateful day.
Among other misfortunes he wrote off four cars, got made redundant, fell into a river, crashed a motorcycle and walked through a plate glass door.
Can't blame him, really.
2) ...and it didn't stop when he died
When Bob died of cancer in 1998, his widow Betty – who on previous Friday 13ths had fallen downstairs, been hit by falling guttering and been hospitalised after Bob hit her in the face with a stick he was throwing to a dog - decided to book his funeral for Friday 13th March as a final tribute
Alas, all Rhyl’s undertakers were too busy.
“Bob would have seen the funny side,” said Mrs Renphrey.
3) A not so happy ending
Former Sunderland striker Michael Chopra broke up with WAG Heather Swan just three weeks after their £250,000 wedding.
Care to hazard a guess when they got married?
Yep, the ceremony was held on Friday 13th June, 2008.
4) Even staying in bed couldn't help this man
Friday 13th August 1976, was particularly unlucky for New York man Daz Baxter.
Having elected to stay in bed to ward off bad luck, the floor of his apartment block collapsed and he fell six storeys to his death.
5) The unluckiest day of this couple's life?
Michelle and Gary Docherty had a memorable wedding on Friday 13th August 2004.
First, a swarm of wasps attacked guests at East Kilbride Registry Office, Lanarkshire, as they waited for Michelle’s arrival.
Her aunt Mary Strachan smashed an expensive digital camera trying to swat one of the pests, and when Michelle finally did turn up, an insect flew up her dress, triggering a panic attack.
After the ceremony, two minibuses booked to transport guests to the reception failed to turn up and the couple lost their wedding video.
6) A real life disaster situation
Friday 13th October 1972, was the date a plane carrying Uruguayan rugby team Montevideo Old Christians crashed on its way from Montevideo to Santiago, Chile.
When rescuers finally found the 14 survivors two months later, it emerged that they had survived by eating human flesh from some of 31 crew and passengers who perished in the crash.
In 1992, the story was filmed as Alive, starring Ethan Hawke.
7) A seriously unlucky accident
A full moon on Friday February 13th 1987, drove troubled Robert Bullard, 21, to attempt suicide by putting his head in a gas oven.
Not only was his methodology flawed – suicide by natural gassing is virtually impossible since Britain moved from lethal coke gas to less dangerous natural gas – but a flicked light switch caused an explosion which injured his mother and a policeman and caused £35,000.
Robert was unharmed.
8) Britain's unluckiest man
Friday 13th February 1998 was simply business as usual for Mancunian John Sheridan, dubbed Britain’s unluckiest man after once having his car stolen five times in one day, making 16 trips to casualty in two years, seeing eight TVs explode in six months and losing out on a £4000 lottery win when he put the ticket in the washing machine with his jeans.
John’s big day began when his Saab ran out of petrol. He hitched a lift with a sympathetic policeman, whose car broke down at the garage.
John returned to his car with a can of petrol, got it started but lost a wheel as he turned a corner. He returned home on a bus, which broke down.
Completing his journey on foot, he realised he’d left his keys inside the car and had to return in case in was stolen.
9) A bad choice of fancy dress
In April 2008 a Thames Valley police helicopter and armed response unit swooped on Bicester, Oxfordshire after receiving reports of a man wandering through the town centre wielding a chainsaw.
They found a partygoer who had elected to dress up as Jason from the Friday 13th movies.
A police spokesman said: "They discovered he had removed the blades from his chainsaw and was wearing what was possibly fancy dress .
"Our officers told him to cover up his outfit, or he would be given a fixed penalty notice."
10) Freak weather chaos
On Friday 13th October 13 2006, 36 inches of snow fell on upstate New York.
The ensuing chaos claimed three lives and incurred $130 million of damage.
11) Tupac loses his battle
Friday September 13th 1996, saw rapper Tupac Shakur die of wounds he received in a drive-by shooting after Mike Tyson’s comeback fight against Bruce Seldon in Las Vegas on September 6.
After Shakur’s cremation, members of his posse Outlawz Immortal mixed some of his ashes with marijuana and smoked them.
12) No one SAW that coming
On Friday 13th March 2009, Thorpe Park premiered its new 'SAW - The Ride' based on the successful horror film.
However, it looks like the curse of the day could have struck because the ride had to promptly shut down because of technical problems.
13) A mere coincidence?
And the unluckiest Friday 13th of them all - on Friday October 13th 1925, Lincolnshire couple Alfred and Beatrice Roberts had their second child.
She’s better known now as Margaret Thatcher.
Do YOU think Friday 13th is particularly unlucky?
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Love a good scare? Why not watch one of these gory horror films on Friday 13th this month?