Money-Shredding Alarm Clock

Alarm clocks really represent our battle against ourselves: the part of each person that wants to sleep versus the part that knows he or she needs to get up. Well, to really align your incentives, try this devilish invention: an alarm clock that slowly shreds your cash if you fail to get up on time. How much do you really want to sleep in? Could you put a dollar amount on it...?

[AcidCow via notcot, but I can't find the original designer - anyone?]