"Gotta Go!" Achievment...

Can a blue confirm if there's just some kind of gimmick behind this all that we're not getting? As it stands, the only theories concerning how to get this achievement involve some really bizarre strats using Mind-Numbing/CoT and burning him down in a sub-5 second time frame.

I don't need to know what the gimmick is, just that there is one and that the difficulty of this achievement isn't some kind of glaring oversight on behalf of the people designing em.