A little observation and courage go a long way in making a difference in someone’s life. In any setting, situations catch us off guard and it’s only astute thinking that can help. A woman named Flaviane Pimenta Carvalho, a server at Mrs. Potato Restaurant in Florida, quickly responded to a silent cry for help, per CNN. When she saw a teenager seated at a table seemingly quiet and distraught, she knew something was up. She persisted in her indirect attempts to find out whether something was wrong and managed to save the boy’s life. Her response? Nothing but careful observation and a powerful 4-word note.