I knew I should have fished out a camera when I put my couch on top of my car. I was moving and didn't have a camera handy.
Imagine a 8' long full sized sofa on top of a VW Golf. And well that is exactly what was going on. My car was packed full too. My friend had to drive his cr to my new apartment to help me get it back down.
I have a Thule rack, Sofa fit pretty well. I only drove 1.8 miles with it on top.