smell-based alarm system

This will save so many lives once it hits the marketplace.

http://blogs.scientificamerican.com/scicurious-brain/2011/09/30/ignobel-price-winner-safety-in-smell/

The secret ingredient -- wasabi. Air sprayed. It will do something that some fire alarms cannot do, especially for the deaf -- it smells so awful that it will wake people up.