That would be it.

I can kill you with an IV almost as fast as I can with a knife. I know how to use the latter, but not the former. This can be a ZERO forgiveness procedure if you screw up. I could do an IM if it was "he dies in ten minutes if you don't" situation, but IV's, no way. And even then, the IM would be something like an epipen that is prepacked.

To quote my sister-in-law, who is an EMT-I, if you have to do a stick, you better be able to hear the sirens or see the lights, or have the [chopper] on the radio and the LZ within 10 minutes walk with a litter.