Actually... this was just a thread I made to Rick Roll people. There is, at least to my knowledge, no exploit for any Wave 3 clearing.
Somebody on Asura was flooding yell with this kind of misinformation and was calling out multiple names of Asura players as the people that were using this imaginary exploit. By flooding, I mean he was spamming yell for over an hour.
Since... I never really do anything like this I thought people would fall for it and maybe get a smile out of it because nobody ever expects the Rick Roll when it is buried in, what looks like, a legit post. I thought it would be fun if I used this person's Spike Flail of Retardation in yell to make a spoof thread and stick a hidden Rick Roll in it.
Nobody ever expects the innocent widdle White Mage that posts memes to Rick Roll them randomly on a Friday thread.
It was more funny in my head when I thought it up.
Bonus modifer: Some people PM'd me on here wanting to know more. Hue hue.