Cat,
As has been said the two services are very different. A major aspect is that in the Fire Service you are part of a team and the team wil support you, it is unlikely that you will be on your own to make a decision.
Another aspect is drilling with the equipment, in my day we did this until we were sick of it, but the benefit was we did not actually have to think how to operate the kit, we had done it so often. Hence if we needed to put a ladder up, a crew got a ladder we all knew what each member of the crew needed to do and we did it, when we saw what position we were in.
Finally there is the understanding of the team. I was told by my first watch commander "If you feel like puking at a job from what you see, tell someone you are going for a walk get round the corner and bring your guts up then come back. We've all done it, just don't let the press see you!"