Child actor Austin O'Brien steals scenes in THE LAST ACTION HERO, although his stand-out performance is not enough to make the film worthwhile.  Not that the filmmakers weren't trying to make a quality picture.  For effort,  THE LAST ACTION PICTURE tops a number of routine action flicks (COMMANDO,  ERASER) Arnold has made.  But by time the closing credits roll, THE LAST  ACTION HERO's slow moments outnumber its memorable ones.  Inspirational  line: "It's what you make it."