Now this might be an impressive show of power. But this is just a case of operators not paying attention to posted power limit on the dyno. "portable" dynos has a lower power rating. Those ratings are there for a reason. Run a car that can over power the dyno and this can happen. Hope everyone and the car is alright. But from the looks of things the car suffered some damages and it looks like the cars behind the dyno also suffered some damages.