Originally Posted by terapinedtheskeptic View Post
The pit boss went through the discard deck
The pit guy is looking through the cards played to see if many small cards have been played which would correlate to +EV advantage and the larger bets the player is now making.

But the funny thing is when they do that they already suspect/know. So it is almost for show. he wants to see if you have a reaction like leaving.

But regardless if it is for show or he is actually looking at the cards it is a warning shot. Often the first warning. Part of the game within the game at most places.