Core strength and stability deficits are apparent in many people.  The ability to restrain movement while keeping a stable base or pillar is essential for injury prevention.  Building prerequesite pillar (hips, torso and shoulders) stability is important before loading a pattern and moving more explosively.  This exercise I recently featured for PFP Magazine incorporates a progression for both options.
Application:  Poor hip, trunk and shoulder stability elevates injury risk with daily activities and sport.  This movement introduces controlled hip extension, torso rotation and shoulder elevation, while aiming to improve pillar strength and stability.  The handle bar moves around the bar facilitating a safe and smooth motion.  Using both hands allows for more control initially allowing the client to incrementally adjust the amount of rotation while they learn to move in a 3D manner.  Working in a slower manner will effectively train anti-rotation strength /control as well. 
The exercise progression provides an option to train explosively to develop power from the ground up using both upper extremities similar to a push press except introducing some rotation to the movement.  Overall, this exercise offers a great way to train the entire kinetic chain in a multiplanar fashion. 
Precautions: Clients with any existing rotator cuff and/or labral pathology or low back dysfunction should proceed with caution initially mastering controlled form with light loads and not push through any discomfort.  Be sure to use proper body mechanics when lifting the bar off the ground as well.