The "don't try this at home" department brings you the product of the month (so far, but it's gonna be hard to beat this one). Skunk Shot Gel was invented by an Australian named Andrew Rakich, who's a satellite and laser engineer by trade.
He said he thought up the idea about 10 years ago as a sort of aerosol for women to use to fend off attackers, or as an animal repellant for gardeners. It's a synthetic product, but chemically its components mimic a skunk's musk.
Turns out the stuff has found a new market: crime fighting. Sheriffs in Compton, California are using it to clear out vacant buildings, and it works! Chris Dixon brought us the whole, stinkin' story in yesterday's New York Times.