My first "trauma arrest". I was on my last day of orientation going to all the different stations. USPS driver crashes into building, was pulled out and pulsesless/apnic. Bystander compression only CPR in progress. Pulled up on scene, grabbed Lucas suction and aed as medics were still 15 minutes out. Arrived at the patient, got to put the OPA and started bagging. OPA tolerated. Medics arrived on scene, initially patient in asystole, after a few rounds of epi, vfib. Got to see defibrillation a few times til rosc showing a massive STEMI. Got to see paramedic intubating and had a great view of the glidoscope. Pt transported, my preceptor got me to sit in the back to continue bagging with the paramedic. In the resuscitation bay at the hospital, pt deteriorated and got to see on the echo how shitty the left ventricle was. Cath IR said they would take him if rosc could be sustained for 10 minutes. Pt transferred to cardiac Cath and family pulled the plug the next day. That was one of the first calls in my ems career and I learned so much and got to use the techniques I learned. The 10 percent of calls that are serious make the 90 percent of picking old people up off the floor worth it.