Sue, Rick, it looks like at 6:24 on the vid the "Katmobile" bottomed-out on a big rock hard enough that it even dragged it along for a bit. It then looks like you Rick, steered to the right to avoid it. I may be wrong (happens all the time) but that's how it looks, probably nothin'...glad you didn't sustain any serious damage Sue! Hope you're feelin' better after your MS flair-up.