Has anyone else noticed that when the rear windows are open, you get an extremely large, (and painful on the ears) whooping noise and pressure that makes you think that a helicopter is flying over you!
I'm just trying to find out if this is something that is 'the way it's going to be' with this car, or that there is some other reason for it.

Yeah bud - thats the way it is.......unfortunately.

I have experienced that as well. If you just open the sunroof and nothing else you get the same effect. However, if you vent the sunroof it will go away. If you open the sunroof fully then crack your back windows open a little and it will go away.

Yeah, that happens. My Fusion did the same thing (except I had no sunroof). I have to lock out the back windows from the kidlets. It's the wind "baffling". Just create a "through flow" as mentioned above.

Haha, my G6 had this problem. Haven't tested this theory on my G8.