If a dealer in a card game, like blackjack, inadvertently reveals their hole card, it could significantly impact the game dynamics. Players might adjust their strategies based on the visible information, potentially leading to different bets or plays. Typically, casinos have strict rules regarding such incidents, often requiring that the hand be played out as normal, or the game may need to be voided and restarted. This situation can create confusion and disrupt the flow of the game, requiring clear communication from the dealer or casino staff on how to proceed.