I've heard good things about a movie called Snowpiercer but I mostly watch TV on Netflix. If you haven't watched Sherlock stop what ever you're doing and watch that. I've been watching this mind f*** of a show called Black Mirror.
In my opinion - within the strict confines of the class - your primary circulatory concern with a patient in a dangerously cold environment is to remove them from that environment.
The difference between statistical and anecdotal evidence.
Ex.: A lot of medical providers would take exception to the new approach to backboarding.
Only one of the two options (evidentiary vs. anecdotal) is accepted as a valid argument.
We do a survey at work (non-EMS) sent to all of our customers via email. They'd have to opt-in during transit I assume? You'd need to train your providers to ask and sell the program.