When someone who has a birthday hears congratulations from other people he is likely to feel glad and happy. And why not? Sincere wishes and kind words can touch even the most serious and moody people. But can you imagine such congratulations that can make you swear? It sounds almost unbelievable, but still true. Have a look here: a guy came from Chicago to congratulate his dad on his birthday and hid in his truck, so when his dad opened the car he was amazed by his son's surprise. And guess what? Yes, he didn't thank him at all!