My first ever shout was an unmitigated disaster. We were called an RTC with a car on fire and we were the first emergency unit on scene.
Unfortunately, the casualty was on the far side of the burning car, and we were unable to get the truck past it. I grabbed my bag, whilst my crewmate told me he would follow shortly with the rest of our gear. I sprinted past the burning car to get to our patient, and started treating him straight away. I then had the fright of my life as the car went BOOM and I was cut off from my oppo, the wagon, and any fom of advice or assistance. It took another 10-15 minutes until further help arrived in which time I wanted to cry (lol).
Anyhoo, the outcome was that the patient was fine, I hadn't done anything wrong or adverse, and the Paramedic and BASICS Dr who arrived were very understanding about the cock-up. I took away a lot of experience from that job, mainly that I should never give up my waterproof jacket in the middle of a torrential rainstorm, as I then had to spend the next 8hours in wet uniform and and wet pants!
Molly, where were you when I needed you lol :D