"The manufacturers, Gumpert, claim the design of the Apollo is optimized so that the car could drive upside-down in a tunnel if driven at sufficiently high speeds (over 190 mph),[6] though this remains to be tested. Top Gear presenter Richard Hammond claims that Gumpert have already found a suitable tunnel and have made all the preparations necessary and are simply waiting for a volunteer driver willing enough to do the test.[7]"
-wiki
I guess there's quite a demand for upside down tunnel driving stunt drivers right now.
Btw, that SLS looks like a 280Z with GTR35 headlights.