The Personal Lives of Stack and Heap

Heap had always known Stack to be a very put-together individual. While Heap was laid back and disorganized, Stack was always very structured and serious, rarely taking any time off or deviating from his routine. One day, Heap came across Stack relaxing on the beach, something that struck him as very odd. Heap, surprised, approached Stack and asked what he was doing. Stack replied, “On exception, I need to unwind.”