happened. this is according to police. when you hear a severing of a spinal cord 80%, how much force does it take to have that happen? >> i would presume a good bit of force. the spinal cord and the spine, you say the spinal cord was severed? >> 80%, yes, sir, according to the attorney. >> 80%. i would presume that a great deal of force could be necessary to sever a spinal cord depending on what happened to the vertebral, the boney elements around the spinal cord. >> so if you were to be pushed or fall how much force behind that? can you try explain that a little farther? i'm trying to understand. when you say bait of force. give an example. >> certainly. the patients we see that have hyperextension neck injuries when they fall, most typically in the bathroom, possibly and hit their heads, their chin on the bathtub, oftentimes that