Two men who claimed to have suffered whiplash injuries had their £17,000 compensation claim thrown out after footage emerged of them playing rugby on Sky Sports.
Caine Herbert, 25, and Steven Blake, 39, demanded cash after a coach they were on was in a collision with a van in March 2015.
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Both said they had suffered health problems and been forced to give up playing rugby.
But insurance investigators were able to expose their lies after finding footage of them scrumming down on a TV show just 15 days later.
The pair featured on the Sky series "School of Hark Knocks" alongside legends Scott Quinnell and Will Greenwood in the programme aimed at helping unemployed convicted offenders.
Footage was shown to His Honour Judge Christopher Vosper QC in Cardiff County Court who dismissed the compensation claim.
Judge Vosper said: "Both had lied and their claims were fundamentally dishonest".
The pair were ordered to pay over £20,000 in legal costs over the bogus claim.
"Caine is one of the most improved guys we have had on the programme," said ex-Welsh international Quinnell.
"He went off to the Army recruitment training and came back a changed man.
"He can do whatever he wants in future."
DWF Senior Solicitor Colin Vickers, who led the investigations, said: "The intelligence gathered, notably the footage from Sky Sports, was instrumental in securing the just result.
"I am delighted to see that the painstaking work that was carried out paid dividends for our client."
Speaking about the outcome, insurer Markerstudy said: "This case highlights why there is a need for the government to tackle whiplash claims.
"Both Claimants sought to opportunistically take advantage of what was a minor coming together between two vehicles, by claiming they were injured when they were not.
"This is the right outcome to the case."