Dream it, and you can achieve it. Case in point, Chinese street performer Lan Guangping, who in this video jumps on four raw eggs without them breaking. Well, he breaks one the first time he tries, but the second time he succeeds, although he breaks an egg on the dismount.
This is a short video of a skateboarder testing the structural integrity of a fancy glass coffee table with a couple quick flip tricks. Amazingly, it passes the test. My coffee table? It would have failed harder than I did algebra class in high school. Numbers were already hard enough,