People believe that ''Bad things will not happen to me,'' thereby disp
laying a sense of unique invulnerability. To vivify the role of such i
llusions, students in a graduate course covering self-illusions receiv
ed information based on actuarial tables about the average age of dyin
g and then reported their estimated ages of death. In Class 1, student
s overestimated their age of death by 9 years. In Class 2, in which st
udents were expressly told that the demonstration would show their sen
se of unique invulnerability, they again overestimated their age of de
ath by 9 years. Closing comments explore the tenacity of unique invuln
erability.