What *exactly* happened to Zaf?

[Beatriz]

I also agree with Skully, I think Zaf's death didn't appear among the top 5 because we didn't actually watch it on tv (and thank god!). He must have been through an excruciating death. A slow death is the worst thing, in my opinion. I know the fat fryer was terrible and shocking but at least it was quicker. Torture is terrible, imagine being tortured to death...

Series 7 Spoiler: show

ask Lucas about it, he almost killed himself to avoid it