Originally Posted by Carleton Hughes

When we were kids Drano bombs were the thing! take a 2 inch pipe nipple with 2 endcaps,fill it halfway with Drano crystals,pour in water,screw on other cap,throw into abandoned car and run!
Anywhere from 40 seconds to 2 minutes then BOOM!! not only did it generally shatter the windows,one piece actually flew thru the roof of an abandoned Valiant