Not likely. To our knowledge there has never been a physical injury incurred to a person as a result of a dyno test on a dreamscience Dynamometer. Cars can come off the rollers, but they do not go anywhere. Moreover, the only way to exit the rolls and keep going is to try to do so (keep your foot to the floor and steer off dyno). It is physically impossible to "launch" a vehicle off of a roller set as the vehicle does not have any momentum, even if you were to cut all straps in the middle of the test. Worst case scenario: your car burns through two or more straps (due to poor location of straps and the exhaust burns the straps) and ends up cockeyed on the rollers, no harm done. On the other hand, we have heard of several cars being dropped by owners of hub-type dynamometers.