The main villain, Handsome Jack, has the most diabolical voice line
Lemme pull it up
"I will pay you to kill yourself. I've got a perfect spot all picked out for ya. You don't want to? That's fine -- call the Hyperion Suicide Prevention Hotline, and you'll get nothing. But if you want a huge reward, you jump off that cliff and become my b**ch. Take your time."
