She always talks in a startled, jumpy way that makes people jump.
Tips
usage
Used to criticize someone for melodramatic overreaction — gasping, shouting, or freaking out at minor things. Often appears in 别一惊一乍的 ('stop being so jumpy'). 乍 here means 'suddenly / abruptly' — same character as in 乍看 (at first glance).
