Sometimes it's important for a company to show its appreciation for their customers and give something back. That's exactly what German manufacturing company Liebherr's did in 2012 when they invited 2,000 of their best customers to the headquarters for a Customer Appreciation Day. None of the customers who showed up had any idea of the show they were in for. Liebherr's showed off its entire fleet of cranes and their own ingenuity by putting on this engineering and physics wonder. I have to imagine that the customers who showed up were very happy with their decision.