That was the sound of your Jeep landing on a huge rock and punching a hole in your oil pan. Well, it certainly wouldn't be fun. Especially if you were out in the middle of nowhere when it happened. If you're doing any kind of serious wheeling, it's only a matter of time before you crash land your Jeep down on a nasty rock and hear those above sounds.
Oil pans are expensive and the tow bill and labor are even more.
Installation is a cakewalk. The skid plate stays out of the way of the oil drain plug, as there is no flange on the rear, so oil changes shouldn't be a problem. According to Turbo City, the skid plate should fit just about any Jeep oil pan.