A sensible gambler will tell you the secret to success is knowing to quit when you're ahead.
However, when two couples from Teesside chose to ignore that advice, it won them a million pounds.
Rather than pocketing forty quid that they had won on a scratchcard, the couples used it to buy a winning Euromillions ticket.
But as Ben Chapman found out, only three of the foursome have been able to pop the champagne corks.
You can watch his full report below.