How do you dance the pirate polka?

In Gendarran Fields, there is a skill challenge issued by Klakka the Brain where you can either fight her or dance the "pirate polka" in order to get the skill point.

How do you do the dance?

Solution 1:

There isn't such a thing.

Skill points are divided into three categories.

Combat - Beat the NPC to gain a skill point.

Item - Clicking on the skill challenge will give you an item that will grant you a skill point when used, sometimes with a comical transformation to go with it.

Channeling - Click on the skill challenge and stand there without interruptions for a couple of seconds to gain a skill point. These types of skill challenges usually look like floating spheres of energy.

EDIT

As pointed out in the comments, that is another, much rarer type of skill challenge which involves answering questions from the NPC. This is one example.

Solution 2:

The 'Pirate Polka' is pirate speak for walking the plank. So what she's ACTUALLY saying is; either fight or leave, there is no dancing involved sadly.