Spartans don't skip obstacles, we overcome them! We strongly discourage skipping obstacles - instead, we encourage you to summon your inner warrior and try, then try again. After all, you did sign up for an OBSTACLE course event.
However, if you simply cannot complete the obstacle you will be required to perform a mandatory penalty of 30 burpees before moving on. This rule is in force for ALL obstacles which can mean a lot of burpees!