Today, in LOLSilver hilarity:
http://drop.sc/252309
Cliffs: I 4gate (badly, my early macro is awful) PvZ and he holds. I build a twilight and forge as a backup (since PvZ I'm only building zealots when I rush, so I have lots of extra gas) and get charge and +1 attack. I mass zealots. He flies an overlord over my base and sees like 12-15 zealots chilling at which point I decide I should move them out (since the jig is up), which he also sees. My zealots DESTROY all 3 of his bases pretty easily, didn't even have a forward pylon.
I think when 4gating zerg I should wait for a couple warp-in rounds before attacking maybe...like, in this game he has queens/spines, and it's tough for 4 zealots and a stalker to take that on. 8/12 zealots would work much better, and if he's still droning at that stage that's raw firepower I'm adding that he won't be able to match.