I took accounting in high school. Enjoyed the hell out of it because my teacher was my FBLA leader and we had a new accounting software that year so she let me and my friend work ahead and we finished the class in 6 weeks and had the rest of the time free to goof off or help the other kids...
The cave thing\tight spaces for sure is something that has crossed my mind many times. I think it stems from when I was a kid back in 1987 and the Baby Jessica story where she was stuck in a well for 50+ hours.