EPT
Another thing to add that I saw some terran doing was starting the bunker after 16 cc, but not finishing it. It appeared that he double scouted to find out what his zerg buddy was doing asap. He would leave his bunker at 99% complete, so if he scouted 12 hatch, just canceled it, or if he saw pool, he would let it finish. The bunker did slow him down slightly, but the cancel gave him minerals back to allow him to keep producing smoothly. He was able to make up the difference in getting the bunker by getting the CC at 16 instead of a safer 18. It justified him cutting a corner early, allowing for a cancel to keep up with a 12 hatch zerg without getting behind for being too safe, but put him ahead against ling aggression. I can't for the life of me remember who it was, though. Too sleepy.
