re: Breaking Bad Thread (NO SPOILERS OUTSIDE OF THIS THREAD. INCLUDING SIGS & CHATBOX.)
Walt confronting Tuco for the first time is one of my all time favourite scenes, probably the first ever glimpse of "Heisenberg".
The poisoning scene is just amazing though, the background, the sub plot (Jesse's trial as the new cook), it was all perfectly set up, and the execution was superb. It really sunk in too when Gus went to visit Hector, listing out the relatives he killed.