Court records say the fire began when Harasymczuk flicked a lighter at a co-worker, who was washing his hands with acetone.

Or maybe kava becomes dangerous if the kavalactones are extracted using ethanol or acetone instead of water, the traditional preparation.

"You could smell all the VOCs," or volatile organic compounds — pollutants like acetone, formaldehyde and toluene that easily become gases and pollute indoor air.