A friend of mine worked in a pub years ago, in the less salubrious part of town, generally frequented by people that had a lot of time on their hands during the day. Just round the corner was a snooker hall. One day somebody came in the pub saying that so-and-so (somebody known to everybody) had won the jackpot on the fruit machine. One hundred quid. My friend said at least 10 or a dozen people drank up and left the pub for the snooker hall. Somebody told him later that they'd gone round and one by one put whatever money they had left straight into the fruit machine. Of course they all lost. Now, it doesn't take a genius to work out that because a fruit machine pays out a hundred quid it doesn't mean it might pay another one out. Trouble is, I don't think there were many geniuses among them.