We turn to hospital whenever we are sick. We know that we are in good hands since we will be handled by experts. There are times, when we can't go to the hospital and that is when ambulance are called to deliver us to the hospital.
However, in this game, the ambulance is not the safest transportation that we can rely our lives to. Instead, it is vehicle of mass destruction as the idea here to create destruction. You need to rush to the other hospital and take out as many people as you can see. Destroy anything on your path along the way.