If you've ever subscribed to a "tipster" service or called one of those two buck a minute hotlines, you'll have heard all the usual claims about inside info, the next big gamble, or even worse - when they tell you that "this horse cannot lose!".
By 5pm on a Saturday you're sitting there with a glum face and empty pockets after spending the weekend's beer vouchers on a 'duff' tip - and that's before you even realise that you've just spent more than your stake money on the price of the call!