A hilarious prank video has gone viral in India, where a man cleans empty air pretending it's a glass door, fooling a customer who tries to open it. <br /><br />The video shows a cleaner miming polishing a door, which an inattentive customer on his phone mistakes for a very clear glass door, causing him to trip and stumble trying to open it. <br /><br />The customer soon realises he was pranked by the shopkeeper, and they all burst into laughter after having fooled the man.<br /><br />The prank ironically took place at a store selling glasses in Chittoor, Andhra Pradesh in south India, on November 12.
