[worstenbrood]

I have a similar experience. 20 years ago a friend told me a trick which only worked on vending machines from a particular brand. It only worked on the drinks with the lowest price. You had to put the exact money in the machine for a certain drink, add one cent and press the button for that drink right when you hear the "click" of the money. You get the drink and your money was increased by one cent. After you were done you could just get the money back. It required some practice but when your timing was good you could empty a complete machine. Since most of the vending machines had redbull and jupiler, which had the highest price, we had alot of free cola/sprite/.... I wonder if it still works.