Yes, it was big, flat, and when it came out, the thud sound was more like a fiberglass sound, not metal... I think that's why I'm unsure about what it could have been. Aren't skid plates metal? I even saw what looked like a corner break off of the larger piece as is came out the back end.

I HOPE I didn't mess up the underside too bad, and as for the paint, I'm told the scratches will be easily rubbed out because they're only light scratches on the clear coat.
You're probably right about a Jeep being better for off-road driving, but, it was so much fun in my Volvo. How about if I just keep the off road driving to mud, not so much rocks? I think the vehicle height is an issue. Thinking I'll save up to get it lifted.