Toss Strat

1 Bunker + 1 (or more, taking you should be faster than a DT build with terrans) Turrets + 1 Comsat (as back up), and you have a Anti-Dark Templar. Hmm, photons...I remember being a victem to it the first time I've seen it. Best thing to do is stop the damn probe, blow it or simply block it from making the cannon. If you fail to do that, repair whatever building the cannons are shooting as best as you can to buy time while you pump out tanks! or Medics with Stim pack marines, since marines by themselves WILL be owned if its a skillful Cannon Rush Player. If the building being shot is your CC...harvest 500 minerals first, then get out of there to your allies base (otherwise you lost for your stupidity of letting him Cannon at your CC! How blind can you get?!)