Person: "fucku, dam botz!"
Me: "ni hao" (I really just intended to greet him.)
Person: "Omfg, autorepliez!"
Me: "ni hao" (Obviously I was catching on to him sayign auto-reply. xP )
Person: "im gonna kill u!"
Me: "ni hao" (Keeping form!)
*Person now aggroes mobs and tries to train them on me. I fake some casts without taking aggro and move around bot-like. (keyboard turning and moving. )
*Person dies.

Funniest moment for me still.