Essential safety & rescue knowledge
As a non-climber, it was extremely useful to learn proper rope technique and understand traction-and-pulley-systems in the context of a rescue.
You start with the basic concepts of a rescue (both a self-rescue and rescuing someone who's in a hole) using basic simple equipment, moving on to look at different gadgets and techniques available to help.
The hands-on practice all the way through was invaluable in getting these skills thoroughly ingrained. Highly recommended.