Apparently, alleged criminal masterminds Alex Joshua Horn and Johnathan Anthony Porche tipped off police by inquiring about PVC pipe and gun power at a local Wal-mart. (Subtle!) 

However, it wasn't the police that ultimately foiled the alleged bomb plot, but the cherry on Porche's lit cigarette. 

The ash from the teen's cigarette ignited a bottle filled with gun powder shoplif–I mean, procured from Wal-Mart, causing considerable damage to Porche's residence and to the boys' persons. 

Perhaps we should listen to our parents when they say things like "don't smoke; it's bad for you" or "don't attempt to make pipe-bombs with stolen explosives, especially if you're dumb enough to keep an open flame around where you're making them."

(read the rest at RationReality.com)