Nothing very bad. I know that lots of people are afraid to start playing live games just because their internet connection is not stable. However, there is no reason for that. All live casinos work with the same principle as the regular ones — they log everything very carefully. This means if your internet connection gets interrupted, once you are back online, the game will start from the point you left it. In case you lost the internet for a long time, your bet will be returned to you.