I think that's basically what SC1/BW did. There was a professional game last year[1] where one player (Jaedong, probably the best Zerg at the end of BW) had one

I think that's basically what SC1/BW did. There was a professional game last year[1] where one player (Jaedong, probably the best Zerg at the end of BW) had one unit blocking a ramp in his base, and something like 30 hydralisks stacked up behind it. He was attacking the enemy so he didn't notice at first and I think he probably lost his main army but then found a huge second army that had been stuck and just rolled the poor guy. [1] http://www.teamliquid.net/blogs/viewblog.php?topic_id=306999 http://www.teamliquid.net/blogs/viewblog.php?topic_id=306999