Another one of the movements I consider to be a special strength exercise in CrossFit is the thruster. It is a combine of leg strength, hip extension power, front rack/overhead mobility. If any one of these areas is lagging behind the others it will hold back your ability to move as heavy as loads as possible. It will limit your ability to perform them as efficiently as possible.
I like using the thruster in a strength setting of the class a couple times a year because it gives people the opportunity to gain confidence moving heavier loads in it. This realization of their makes the typically prescribed 95/65 thruster load seem much less intimidating