Act exactly as someone, as if you are mirroring someone in behavior.
+Positive: Treat a person well if they treat you well.
-Negative: Treat a person bad if they treat you bad.
Person one: "Would you like a free ticket to the concert tonight?"
Person two: "I would love one! I'll pick you up so you don't have to waste gas."
Person one: "I can see the Freshman 15 hit you pretty hard."
Person two: "I can see from your bruises your boyfriend has been hitting you pretty hard too."