Snoozing - What's the point?

My roommate always sets his alarm for two hours before he has to get up to go to work. Then he snoozes his alarm for over an hour. I dont understand that. Why not just set the alarm for the actual time that you have to wake up. His alarm is SO loud that it wakes me up everytime. Maybe next time it happens I should just unplug it and throw it out the window!