Originally Posted by Dave Van Skike
others with a more developed press will chime in but the first thing that comes to mind WRT strict press is your back is arched and your pelvis rotated back. (anterior tilt) this mean that when you reach the sticking point, you're bending back at the waist putting shear force on the lumbar spine...you will feel a lot of static compressive force but that's what the spine is pretty good at.
This is also what I am referring to in my above response. You want to break at the hips, not hyperextend your back, in order to get that bar path clear of your face.