The question arises, is this real or fake?
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Mercedes SLS AMG - Extreme Looping!
Driving upside down through a tunnel is only a matter of down force combined with g-forces created during the loop, verse gravity. The total pressure of down force when combined with the g-forces created by effectively circling the perimeter of the tunnel must exceed the total weight of the vehicle and driver. If this level of pressure can be reached, a vehicle can in theory drive upside down through a tunnel. The latest Mercedes-Benz SLS AMG video suggests that "practical testing" of their sports car allows it to drive upside down. Mercedes-Benz isn't the only one to claim this, the Gumpert Apollo previously stated that it's vehicle could also drive upside down through a tunnel. However, Gumpert failed to find a driver before Mercedes-Benz.
The question arises, is this real or fake?
Source
The question arises, is this real or fake?
Source