A company wanted to set up a pension plan for its employees. 100% participation of the employees were required to install the plan. The plan was in the best interest of all the employees and made sense to everyone. Except Samuel, everyone signed up. Samuel's supervisor and other co-workers had tried to persuade him without success. Samuel not signing was the only obstacle for the implementation of the plan.
The owner of the company called Samuel in his office and said "Samuel, here is the pen and these are the papers for you to sign to enroll in the pension plan. If you don't enroll, you are fired this minute." Samuel signed the papers right away.
The owner asked Samuel, why he hadn't signed earlier. Samuel replied "No one explained the plan quite clearly as you did."
External motivation comes from outside such as fame, fear, social approval and money. Fear of getting spanked by parents and fear of getting fired at work are some examples of external motivation.