The biggest line moves I ever saw was when Doc released his Big 10 GOY. I remember one year a friend and I was at the Sands book and my friend had subscribed to Doc's service. The play was on Indiana -3. It was this year that I feel someone at Doc's were leaking the play to Vegas. I remember being at a pay phone to call Doc and get the play at exactly 10 am. The password was "apple". I got the play and rushed over to the betting windows to put the plays in for my friend. While I was in line the line moved to 3.5, then 4 and by the time I got to the window it was 4.5. I put in his bets and parlayed the play with the rest of Doc's other lower rated plays because the Sand's at the time had the highest parlay odds.
We left for the RIO after the bets were made. At the RIO, the line had already moved to 8.5 then 9, and I begged my friend to loan me $300 so I coould bet the other side and try for a middle. He refused to loan it to me because he thought it would jinx our earlier bets on Indiana. Naturally, Indiana only won by 3. I got lucky because I made my bets with a local at 3. Ironically, all of Doc's other 6,5 and 4 star plays all won.