World War Z - Official Trailer

Super fast, super strong zombies?

Seems like a good motivational movie to get in shape to crush the horde in the upcoming fight!  Zombies (yeah its fictional but stay with me) are able to perform superhuman feats because the brain is turned off.  But the fact that if a properly conditioned body is able to do x,y or z but the brain or more precisely THINKING that its not possible is the limiting factor then how do you shut down the brain and do the impossible?

In other words how do you push it to the limit without placing yourself in that life and death, adrenalin filled predicament?  How do you attain maximum physical capability on a daily basis?

When you figure it out let me know.