If you are out on bail you are liable to show up for all the court dates. In case you do not appear for all the court hearings, the judge may issue a bench warrant against you called Failure to Appear arrest warrant or FTA bench warrant. After you are arrested under FTA warrant you have to stay in jail until a court hearing on your FTA. So you will have to face double charges, the charges for which you were out on bail initially and additional FTA charges.
