A topic for MYTH BUSTERS: Opening doors, hood, etc "to prevent damage when lifting?

[32valvesftw]

I thought one of the concerns is that is that some stress / flex in the frame may get transferred to the top and crack it. That said I have jacked mine up a number of times and always keep the doors and hatch closed with no ill effects.
I think the Engineering needed to PROVE this is quite complicated and would require a Finite Element Analysis and a bunch of 3D CAD work. However if some one has some strain gauges laying around, I'd be willing to experiment by putting some strain gauges on the frame and other places to see what kind of readings you get when jacking the car up both ways doors and hatch open as well as closed.