The cadavers do not hit the glass at sled speeds below about 8 miles per hour, and the glass breaks at sled speeds of about 10 miles per hour. Penetration occurs at sled speeds of about 13 miles per hour in standard windshields and at about 23 miles per hour with the experimental windshields. At subpenetration impact speeds, the injuries are lacerations, abrasions, and gouges in soft tissue. When penetration occurs, the injuries become much more severe, including deep lacerations and facial bone fractures. Incomplete evaluation of the dummy for use in determining the injury from glass impact indicates that the penetration speed can probably be ascertained with the dummy, but the extent of injury will have to be inferred from the conditions of break rather than from actual "injuries" observable on the dummy.