This one speaks for itself: Boing Boing: Explosive sink and toilet plunger is a gift from the gods

But Home Depot had one of those videos running next to the set-up, which showed clogged sink after clogged sink giving up its precious bolus of greasy hair to the explosive force of a CO2 cartridge unleashing its entire payload at once. Watching the guy on the demo using the device, with its rifle-like kickback and puff of condensed carbon dioxide gas, mesmerized me. The next thing I knew, I was racing home with my new KleerDrain.

I could hardly wait to use it on a slow-draining sink in the bathroom. I duct taped the overflow drain on the sink, and inserted a CO2 cartridge into the Kleer Drain. I screwed on the rubber cone and then pressed it into the drain opening.

WHAM!