HEY, KIDS! Don't Let Any Of Your Dumb-Ass Grownups Try This At Home!
Multi-tasking is NOT an option.
Who knew? Dry potting soil is flammable.
In fact, it will smolder and burn slowly, for hours, like a not-so-good cigar, as all the peat moss and other organic material in the potting mix burns into ash, and the plastic pot melts and shifts into a Geiger-influenced piece of alien art.
The lesson here is... when you have smokers visiting the house, maybe you should hunt up an actual ashtray for them to use, rather than having them drop their cigarette butts into that handy pot of "dirt".