Zombies? Lifting? Obstacles? Isn't running hard enough?

A friend of mine is considering a race called the Civilian Military Combine which is described as the "ultimate test of your strength, endurance, and agility." According to the website, the CMC competition "is broken down into three components to test strength, endurance and agility. Race day structure will consist of “The PIT” (lifting element) into a 7 mile mountain race with 7 strategically placed massive military obstacles." Sounds like fun!

In the same vein, I recently got a press release for another event called Run for Your Lives where "Runners [will] navigate a series of 12 obstacles throughout a 5K course in an attempt to reach the finish line — all while avoiding zombies." This sounds less rigorous than the CMC, but knowing how I feel after only running a 5K I wonder if it would just be too much.

I'm looking forward to the Dirty Sock 10K in August. No strength tests or obstacles, just 6.2 miles through steamy woods. Both times I've run it I've practically needed an IV with electrolyte fluids at the finish. I know my limits. I wonder about those that don't.