Once when I was in Vegas at the STARDUST (STARBUST): The LAKERS-SHOWTIME game was getting ready to tip off: and WHAM the Line Moved from LAKERS -6 to -7.5!  The Lakers COVERED!  This is when the LAKERS would cover 10 games in a row and it really HIT VEGAS!  Watch the money movement going into game time.  At the Stardust then the sports book would have to change the line manually with a ladder they would change the line!  Those day's are LONG GONE!