This improv game is in the following improv game categories:
The idea is to open a 2 player scene with a line of dialog that manipulates the other player's emotional state. This can be positive (Gee Robin, you look handsome today) or negative (Mary, have you been snacking again lately, I think you've gained even more weight). Player 2 should accept this manipulation, and let it change the emotional state of her character.
We mentioned Trust : it should be clear to the players that we are manipulating the emotions of characters, not the players themselves. Furthermore, the word 'manipulation' may have a negative connotation for some - this is merely a technique, not intended to make others feel bad/sad/manipulated. Do not use this exercise unless the players have developed a great deal of trust; if this exercise makes a player uncomfortable, then stop the exercise.
Another variation is to blurt out dialog to which the emotional reaction cannot be predicted (Honey I'm pregnant) - but also in that case player 2 should react with a change in emotion. E.g. happy: That's so wonderful baby, we've been trying for such a long time. Versus mad: You silly cow, don't tell me you forgot your birth control pills again. Versus sad: That makes me think of poor little Jimmy again, I miss him so much.