Everyone thinks they are the most important person in the world. Had many similar incidents, the best (purely from a revenge point of view) was when had went to a patient having an AMI and a doctor's clinic and they were very sick, with vomiting too. Someone had parked in the ambulance space, so we had to block the car park. As we wheeled the patient out to the ambulance, the person who had parked in the ambulance space came and complained we were blocking them in. I said she will have to wait until we finished. She then started ranting on about some appointment she had. I said something about parking in our space. So she then came around to give me an ear full, and stepped right into the line of fire of our vomiting patient. All I could do was smile. When on they way to hospital, our patient said told us he could have missed. Priceless.