A pretty useless test but...
The Ducato's cab and frame are no doubt quite a bit stiffer than the motorhome structure built on top of them, and there's a heavy drivetrain up front which wants to keep falling down, so the entire cab and frame are flexing the motorhome structure and partially collapsing the front of it.What's with the cab hinge point? Does the frame flex or just tilt in relation to the body?
I guess it could be more severe, but it does hit the ground at sqrt(2*(32 ft/sec^2)*3 ft) = 14 ft/sec or 10 mph, and it impact surface is concrete.Not much of a "test" when you gently lift up a vehicle with a crane and only drop it 3' straight down. In fact, pretty ridiculous!