In the early 90's, I was driving through rural Texas with the top off of my ‘88 Jeep Wrangler. Nice day, in no rush, I end up behind a pickup pulling a cattle trailer. Then it happened. I started noticing some sprinkles on my windshield and felt drops hitting me. Checked for clouds; nope. Then the smell hit me. The cattle in the trailer ahead of me decided to relieve themselves, showering me in a mist of the most disgusting mixture of #1 & #2. I quickly pulled over but it was too late to get that smell off of me or the interior of my Jeep. It took several weeks, and a couple of shampooings, before the smell left the seats.