These people in Germany shopping for a new bed understand the importance of lying on the mattress to see how comfortable it is before buying it. They are in for quite a shock when they decide to test the water bed out. The sign in German warns shoppers to take all sharp articles out of their pockets. Fortunately, they all appeared to have a good laugh at the end of this funny candid camera style prank. If you’d like a really comfortable mattress you might like the Tuft and Needle Mattress.