A man obsessed with stealing valuable jewels murders one woman and attempts to drive the other one (his wife) crazy. His single-mindedness, driven by selfish motives, caused him to deceive and manipulate in order to obtain what he wanted regardless of the cost to others. Fortunately, he is discovered just before he tries to commit his wife to an insane asylum.

While this is the dramatic plot of the 1944 movie Gaslight (starring Ingrid Bergman) it could easily be applied to every day. A person with narcissistic tendencies takes advantage of others to get what they want, resorting to deceptive tactics like twisting the truth. Any slight exposure to reality causes them to claim that other’s perceptions are inaccurate and possibly crazy. They even go to the extreme of hiding things and then saying the other person lost the items.