Paul Wood - better known as Woody from the Woody & Kleiny prank videos - was stuck in traffic when he saw something that didn't make sense so took a photo of it.
So far, so normal, except this time that picture earned him a massive £10,000 and means an abandoned house is back on the market.
See also: The three stages of renting a home
"I was stuck in the worst ever traffic jam near Kilburn so decided to take a narrow side street, which left me gridlocked for about 25 minutes," he told Mirror Money.
"Next to me, was a house which looked in a right state among many grand properties, and it made no sense.
"I took a snap of it, took note of the address, and thought it would be a bit of fun when I uploaded it to YouSpotProperty.com – a company I had seen in my Facebook stream for having rescued a number of houses in North London."
Reporting abandoned homes gets you a £20 Amazon or M&S voucher, but it could get you a lot more. Because if the firm manages to get the home back onto the market you get 1% of the sale price - in Woody's case an astonishing £10,000.
The company investigated the West Hampstead home – a large house which had been empty for almost a decade - and eventually bought it.
"I was chuffed enough with the £20 voucher and never expected I'd actually get their 1% payout but I did!" Woody said.
The growing empty homes problem
There are more empty homes than last year, despite the rising housing crisis
There are an estimated 200,000 homes standing empty and unused in Britain, according to government figures.
Worse, high prices mean it's increasingly difficult in some areas for councils, or even developers to get them back on the market.
Local authorities have the power to force the sale of an empty or derelict home to bring it back into use – either to buy them themselves or force a sale if people ignore statutory notices or have unpaid debts.
You can report any derelict or empty homes to them – generally by visiting their website. There's more information about what you can do and the powers councils have here .
The problem is, in many cases, councils don't have the money or resources to act.
"The issue of empty homes cannot be dealt with through one solution alone as there are numerous reasons why they become empty when housing and temporary accommodation is an ever-growing social issue," said Nick Kalms, founder of the company YouSpotProperty.com – whose mission is to get as many of these back on the market as possible.
"Although the Government has made bold housebuilding pledges it will take years to see developments spring into action. Tackling empty homes should be an ongoing priority for all councils who themselves are guilty of holding large numbers of empty properties in their own hands."
Thousands of homes abandoned each year
Why are so many homes standing empty? Mostly it's about complications around what happens when their owners die.
"The overriding reason remains a deadlock around probate. Families need greater assistance in resolving probates involving property which can otherwise be used to provide valuable housing," Kalms said.
Probate is the process by which a deceased person's estate is liquidated to cover unpaid debts and taxes, with remaining funds awarded to next of kin, where no will is present.
Danny Curran, chairman probate association IAPPR and founder of Finders International , said: "We've noted 17% increase in probate-related property cases since 2015 (inactive or deceased property owners). These houses therefore remain unoccupied for extended periods of time.
"The reasons are numerous, but the imbalanced property market over recent years has contributed to more empty homes stuck in probate."
These are some of the key issues they've found that lead to homes 'sitting empty':
Families hang onto these properties as they believe it's a valuable asset for the future, but they often fall into disrepair in the interim.
Families are cash strapped to fix properties up to the standards fit for profitable resale, so they remain locked up.
Correspondence from councils can seem aggressive on one hand (if they issue compulsory purchase orders) on the other hand an irritation – whereby they implore owners to do something about it, but offer no support or solution. A solution to this is for councils to use trusted intermediary companies that have warmer approaches to the owners. Councils often struggle to track down family members who own these properties. We know this from our international members.
Individuals holding onto these properties often 'wait for the perfect timing' – and in the past couple of years, for example, the housing market was buoyant in 2015 yet stalled in and around the referendum in June 2016.
Another main contributor is physical or mental health issues, either of the owners or executors – individuals not having the capacity or inclination to make big legal and financial decisions. These issues can also include emotional attachments to the property in question.
What you can do if you spot an empty home
The good news is that councils aren't the only people who can bring these homes back onto the market.
Kalms and Radstone have bought 325 homes over the past five years allowing them to be renovated and put back into use.
To help speed up the process, they also reward members of the public who spot and report empty or derelict homes with £20 worth of Amazon or M&S vouchers and 1% of the purchase price if the home is bought.
Another £500 goes into a local community charity. An estimated 2,700 people have earnt vouchers so far, while 49 have received full commissions like Woody.
You can report empty homes to them here.