I feel the need to dedicate an entire Autopsy to the warm-up and cool-down, because there is an ostensible lack of documentation on them here. In addition to this, those of us designing and posting DCs sometimes take for granted that not everyone understands the warm-up and cool-down process, or even knows that it should be done by default for every DC.
Most people aren't prepared for the extreme level needed to negotiate the challenging obstacles presented in the Fatal Fitness Death Certificates. There is no shame in not being able to complete or handle anything found in our programs. The most important thing to bring to the table is your willpower, which is the only weapon needed to rise to the occassion.