@surjimmy reminded me of this true story/prank with his comments about 'raising' cockleburrs in the goathead thread. Years ago, one of the shops I worked in had an employee who was not the brightest crayon in the box. To label him "gray" would be an extreme compliment. Anyway, do you remember the gadgets (magnets) they sold years ago to put on the fuel lines in your vehicle to improve gas mileage? Well, he bit. He bought some and installed them on the fuel lines on his pick-up truck. Everybody else in the shop got together and devised a plan. They would take turns bringing a gallon of gasoline in a can every day and dumping it in his fuel tank when he was busy. It worked beautifully. He bit ... hook, line, and sinker. My gawd, his truck was "making" gasoline! He couldn't believe it! This went on for weeks, until someone couldn't stand it any longer and busted a gut laughing. Game over! True story.