I have been in EMS for twenty three years. I have seen a lot more than I want to remember.Today was interesting. I was on another call so I missed the scene but followed the Ambulance to the ER and assisted there for about an hour. I knew it would be bad because there was a Police Officer driving our Ambulance and a squad car blocking the intersection so that the ambulance could get through faster. The Ambulance was staffed with a EMT-P and a EMT-I with a combined street experience of plus twenty years. Also a student EMT-B was on board doing her ride along time. The call was for a employee of a local tire store that was injured from a tire blowing up. I have always heard that over inflating tires can be dangerous. I have heard of incidents were a mechanic or other tire pro was injured when a tire blew up while being inflated. I had never seen it or know anyone who had this type of call, until today. The patient was A&O X3 c/o SOB. Skin color was gray and he had a small abrasion just right of the mid sternal area. No other obvious injuries or complaints.Total scene time extended to six minutes because the patient became combative when they trauma packaged him. Transport time was three minutes to the ER. Patient remained combative en route. Two minutes after arrival in ER the patient went into cardiac arrest. My contribution was limited to drawing labs, hanging fluids and doing my turn at CPR. Chest xray showed trauma to the aorta and the patient bleed out internally. Since the patient was only twenty five with a signed donor card and consent by the family he was parted out. At least there is a silver lining for some today.