I'm pretty sure there was a goat tied a few seats behind me once when I travelled Moscow-Tashkent-Lahore quite a few years back.
But that wasn't the worst part. The worst part was when I undid the food tray, underneath the new paint I could see something written in Urdu and the realization of the fact that they are using planes which aren't even fit to fly with PIA freaked me out.
But don't worry, you'll be already unconscious because of the smell in case anything happens(God forbid), so you won't feel any pain.