The Post-Apocalyptic Workout looks interesting. It’s all about surviving “at the end of the world.” Whether that’s an actual zombie scenario or a natural disaster or whatnot is purely academic. The interesting and unique thing about this workout is that it is not only about physical fitness, but there is a also a pretty heavy skillbuilding component: first aid, firearms, growing food, etc. Those are just plain useful skills to have, regardless.
Truth be told, I have a motorcycle license for similar reasons — not to survive a zombie apocalypse, but because spies and superheros need to know how to ride a bike. This might be because of that This American Life episode about superpowers (and the one girl who had a giant list of superhero/superspy skills she would check off as she learned each one), but I am not sure, as I forget whether the motorcycle or the superpowers show came first.