SeisMac turns your Sudden Motion Sensor-equipped laptop into a three-axis seismograph. The resizable, real-time scrolling display shows an enormous amount of acceleration information. Place your laptop on a table, and see your toe tapping on the floor. Lay your laptop on your chest and see your heartbeat. And, of course, if there is a real earthquake, SeisMac will be displaying full seismic information while you drop, cover and hold-on.