As Americans across the country celebrate Independence Day with parades, barbecues, and fireworks displays, the story of a woman begging bystanders not to call an ambulance after she was injured in an accident went viral this week—with universal healthcare advocates pointing to the incident as clear evidence that a Medicare for All system would bring gravely-needed relief to all Americans.

The woman’s leg became trapped between a subway car and platform on Friday night in Boston. Surveillance footage showed other passengers rushing to help the woman, who sustained a deep wound on her leg. A Boston Globe journalist who happened to be on the platform reported that the woman told the crowd she wouldn’t be able to afford a hospital bill if they called an ambulance.

Another bystander told CNN, “She made it a point to say ‘you don’t understand, I have terrible insurance.'” The woman was eventually convinced to go with emergency medical technicians who arrived at the scene.