A laser recently died a violent death (probably natural, though foul play has not been ruled out; we are interviewing a component of interest), and during the autopsy we got a whiff of the tell-tale smell of burnt insulation and saw where the circuitry had failed. One colleague wondered aloud of the viability of selling an air freshener that smelled that way. This is the same one who thought that the scent of acetone would make a good cologne.
From the geek collection
A ruined laser ruby rod should not be discarded! Have a lapidary section it, then cut the clean parts of the rod into facetted gems or cabochons. Give the finished work a megarad of cobalt-60 sterilization. A most amazing padparadscha coloration results.