So I wasn't really feeling up for doing any laddering, I even lost to the hard AI a bit earlier playing around with expanding faster, but I did anyway and came up with the following gem. There's a moment where I take a little force over to his base and I send a zergling up to do a bit of scouting... and out pops a cruiser. Slight moment of indecision and then.... ATTACK! I'm fairly sure most anybody can see the "What the hell....???" moment.

Cons:
-I cut drones a bit early.
-I took too long to take the third again.
-I threw away those first units.
Pros:
-The drone was ready for a cannon rush at the the bottom of the ramp after seeing an earlyish forge.
-The spire went down immediately after seeing the phoenix.
-Decent use of the corrupter's abilities.

http://www.sc2replayed.com/replays/119761-1v1-protoss-zerg-metalopolis