The document provides instructions for what to do if experiencing a heart attack while alone in a car. It recommends coughing vigorously every 2 seconds by taking deep breaths before each cough. Coughing squeezes the heart and keeps blood circulating, while deep breaths get oxygen to the lungs. This technique can help regain a normal heart rhythm and get the person to a hospital until help arrives. The document stresses sharing this information widely as it could save lives, and that heart attacks now occur in all age groups due to lifestyle changes.