What was your favourite plot twist? (And optionally, your least favourite one)

For me, my pick would go to Saw 2. Everything from "Its not live" to Daniel being in the safe, to Amanda working with John to set a trap up on Eric, made me stunned. This ending truly cemented my love for this franchise

As for my least favourite, I'll go with Jigsaw. No offense, but its just a worst version of Saw II's ending, except executed worse. The time difference, the dirty cop getting shilled by a person they hurt, and whatnot just didn't land that decently for me.