This happened near the city of Brasília, Brazil.
A homeless man was being transported in an ambulance after suffering a seizure. All of a sudden, the paramedics noticed something unusual: the man's dog was desperately following the ambulance. He kept going for some kilometers until he was finally allowed to enter the vehicle and join his owner.
The scene happened in March this year, but only went viral on social media this Christmas Eve. As Daily Mail Online reported , 42-year-old paramedic Caliomar Ferreira do Couto recorded the scene and said this was a first for him, after 19 years in the profession. At the hospital, the faithful dog patiently waited by the stretcher while his owner was being cared by the doctors.
— Normand Beaudoin (@tourloo) diciembre 24, 2014 
Dog chases an ambulance in Taguatinga