I can think of a number of situations in which this would have caused me to get busted. But my brother on the other hand would have been in a HEAP O' TROUBLE.
One day he comes back with the pick-up truck and my Dad wants to know how the rear shock mounts were broken. My brother had his usual answer of "Don't know". The truck was pretty crappy, so new damage could just be blamed on rust, etc.
But the real story was that he and his buddies had been out jumping the truck off of some pile or hump of dirt on some old road. Like they say it is not the fall that kills, but the landing.
So I wonder if those devices will measure "hang time" for people like my brother.

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Richard Casto
1972 Porsche 914
2013 Honda Fit Sport
2015 Honda Fit EX
http://motorsport.zyyz.comMoney can't buy happiness, but somehow it's more comfortable to cry in a Porsche than a Kia.