offen each casino has a rule book for poker, read that when you first walk in. some places, like where im from theres an over the line , if more then one chip goes over the line, lets say a stack in your hand then they will stay in , or no cells while in hand or no cards past rail or dead stuff like that , if you read that you should be fine. Every casino has slightly different rules and its usually on just one page of paper. I remember i have won full pot 7ral times where i wasn't suppost to before because they did't take the time to read the rule book.
One time guy had floped quad 7 and he was showing his hand to someone past the rail with it the card went on floor and house called it dead. and i won the pot and won the live mtt too , this was 7 handed .
another time i won a pot because guy didnt flip over his cards and dealer muched his cards. I flopped a strait but rivered 2 pair said i have a strait flipped over my card and he didnt relize i was playing the board
third time was when i was in a 200$ pot and one of the guys was showing his hand to other players while in hand and i asked them to muck his hand because that was not allowed , of corse this was after about the third time he did it and already reseaved his warning , house made his hand dead and I took the pot. I would do this because it would throw them off thinking im messing with him and sometime people need to learn a lesson. I did it to 7ral people saying thats not allowed and only one time did they decar someone hand dead.