Well, with your description of the belly pan, maybe it was a chunk of it caught somewhere rattling, and it finally fell out with the hard turn.
I'm going to have to dive into the front-end, I hit a bump yesterday on my commute (same bump every day) and the whole front-end shimmied and it felt like a tire was just bouncing - maybe just the shocks finally going (or maybe I knocked a wheel-weight off, but it didn't really do much except when driving over the bumps), but for about $150 and my time under the front-end, I can replace all the rubber bushings, another $80 for decent shocks, and then to the alignment shop. The stock rubber is basically shot, and I don't want to waste time/money on the alignment without replacing the bushings first.
Whoops, sorry, that wasn’t your belly-pan, that was jwalsh07.