it Break" gimmick.  Right  before Ann is seen firing the gun at Hugh, the action pauses and an off  screen voice tells the audience that the film will pause for one minute to  give them a chance to solve the crime.  The previous murders are shown under  a large clock ticking the minute away.	After the narrator tells the audience  they can figure the mystery out if they have "paid close attention" (which is  a crock since nothing shown gives real clues to the ending)he finishes by  intoning "DO NOT BE SURPRISED BY WHAT YOU ARE ABOUT TO SEE!!"  At that point  the action resumes. Current video and TV prints do not contain this fun  "murder minute", but older TV prints (at least the one I saw about fifteen  years ago) are still in circulation that do.