In an ad for Kearns Home & Garden Center in Monday's Worcester Telegram & Gazette, a violent explosion was used as a visual metaphor for low prices on thousands of items throughout the store. 'Don't miss our once-a-year 'Explosion Of Savings' event,' read the ad, which equated the destructive detonation of trinitrotoluene (TNT) with great savings on everything from Black & Decker wet-dry vacs to tulip bulbs. 'Start the new year with a 'bang' of a bargain!' 