Well, as someone who has set things on fire with light bulbs under the mattress; flying embers in the wood pile; numerous mattresses, pillows, rugs, clothing, etc. with cigarettes; and maybe a few other inadvertent accidental combustion events*, let me say that cigarettes were the worst among these for sheer danger and financial loss. At least that's been my personal experience.
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* Oh, I forgot burning Christmas wrapping in the fireplace causing a chimney fire which called out the Fire Department on Christmas morning.
It wasn't me that goofed here, but a painter who left a worklight too close to something flammable while he went out to get supperthis cost my insurance more by a factor of about 2500 than all the accidental fires I caused cost me)
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* Oh, I forgot burning Christmas wrapping in the fireplace causing a chimney fire which called out the Fire Department on Christmas morning.
It wasn't me that goofed here, but a painter who left a worklight too close to something flammable while he went out to get supperthis cost my insurance more by a factor of about 2500 than all the accidental fires I caused cost me)