LOL! I just did this one on my alt the other day. I got my first horn going into the cave and I was naieve (sp) enough to think 'This isn't going to be that bad.'

30 minutes later (a full windfury weapon buff) I got the 2nd horn in the final room of the cave.

Yes. To this day, my questing buddy and I use this as the epitome of horrible drop rates by which all others are measured.

There is a yeti related quest that is far... far worse.

In the Hillsbrad Foothills there is a quest called Helcular's Revenge. This quest requires that you kill yetis until Helcular's Rod drops. A simple enough proposition, one that lead a friend and myself into the yeti cave.

After about 45 minutes of killing yetis I submitted a GM ticket. The thing hadn't dropped, and we had killed over 150 of the beasts. In fact, we ended up killing 350+ yetis before our first rod dropped. Yes, our first one.

At the time the rod was, like many quests, an unsharable drop. So, my friend got her rod, and we were left with the prospect of spending another three or four hours killing yetis to get another.

After an additional 270 yetis, and an assurance from a GM the quest was working as intended, a second rod dropped for us.

I never wanted to see another yeti again, ever.

OMG yeah this one wins. Hands down