Jump!

A simple box jump can be a big leap.  Many people can freak out over jumping onto a box.  Conquering your fears is an exhilerating experience which will help you in many area's of your life.  Encourage someone to try something that pushes their limits.  Nothing brings me more joy in the gym (including setting a personal PR) than seeing people realize their potential and make progress.  It is not just a physical accomplishment, it is a life changing experience.

WOD
4-3-2-1 back squat
with a set of max rep ring rows in between.  Not for time but for load.