It's wrong to incite bad emotions in people.
Dave is a theater director who is coaching an actress, Tanya, who is a single mom, through a death scene.
Dave wants to explain to Tanya how to act more sad.
Dave tells Tonya that she needs to use facial expressions more to really sell the fact that she's sad.
Dave tells Tonya that to truly act out the part she needs to image her child is dead, so she feels properly sad.
Tonya appreciates the constructive criticism and gets a better understanding of what she needs to do.
Tonya is disturbed by the suggestion and reflexively visualizes her child's death upsetting her greatly.