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 can help the heart regain its normal rhythm until medical help arrives or the heart feels normal again. The technique has helped heart attack victims reach the hospital and could save lives.