Hi guys. I think this hasn't been posted before.
This is a exploit only for the new Orgrimmar arena.
You just have to wait until your opponent gets close to one of the four moving pillars (marked in yellow):
And then fear him. If you are lucky enough, he'll be feared into the pillar and them BAM. Instant disconnect.
This is similar to the old 'kidney shot+fear' CC disconnect.
Tested and working on EU as 7/11/2008.