If you fail to appear in court, a warrant will be issued for your arrest within 24 hours, usually less. If you were out on a bond and paid a bondsman, then the bondsman would likely send bounty hunters out after you. Usually, in the fine print of the bond agreement, you sign your rights away to allow the bondsmen to use almost any means necessary to find and detain you, including entering a building when they have enough reason to believe you are there.

About 98% of skips (people who avoid their court trial) end up getting caught and brought back to jail.