Android onPause() and device tilt

Question

I am trying to end all of my android activities by called finish() under the onPause method. Now this was working fine until I noticed that the activity finished when I tilted the device (Galaxy tab). So I am assuming that the device pauses the activity and redraws it when tilted horizontally or vertically. This threw a major money wrench into my plan. So the question is, how do you finsih the activity on pause, but not for a system pause like tilting the device. Thanks guys.