We're of the mind that each and every dyno should come with Murphy's Law painted in big, visible letters down the side. For every ten successful dyno runs out there, it seems there's one where events go horribly wrong. Take, for example, the video below. The clip shows what happens when a Ford Shelby GT500 and a mobile dyno have a bit of a disagreement at the Performance Expo 24 in Sherbrooke, Quebec. We won't spoil the results for you, but we will say there's some substantial carnage involved.