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					Originally Posted by Hanni  I had a guy try and land a factory on the platform of my base early in a game today, as if I wasn't going to hear it touchdown or notice it sitting there. | 
	
 
sometimes the pro gamers will land a factory at the same time as an infantry or reaper push as a way to get some helions in your mineral line...but i've never seen it do any serious damage.  
I think (in the case of the pros) that it's more a case of the factory as 1) scouting tactic 2) useless building (when building a bio ball) and 3) hope and prayer (for potential dmg if not spotted)