I have a theory that every single mob that gets stuck on a slope, where I can neither loot it from above, or jump high enough to reach it, has a rare world drop on it. It’s also extremely frustrating when you are after one more quest item and you know that the quest item is on that mob.
Provided by 
Pugnacious Priest's Warcraft Blog 
Hehe, unlucky mate! I’ve had so many of those I now refuse to fight on anything greater than a 5 degree incline 🙂
Yes! I do this too!
I also feel obliged to stop and kill any rare spawn that I happen to past – even in the early contested zones! And all they ever seem to drop is silver… but I’m convinced the *next* one will have something special.