That was the most explicit violence/torture I've ever seen on network television.
I do love it, however, whenever Jack goes into psychopath mode and the look on his face when he gets the SIM card to work is priceless.
Edit: I will say this is the first time the torture on 24 has bothered me. I think it's because it's the first time he wasn't torturing people to save the world, he was torturing someone just because he's become a fucked up nut job.
I know in the real world torture doesn't work, but at least in the land of 24 it was always justified when Jack would get some information that would potentially save millions of people.
When he's using about eight different torture implements essentially for fun it evokes a different emotional reaction - at least for me.
Edit #2: Before someone else says it - yes I know the torture scene is a homage to Reservoir Dogs.