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xkcd #2929: Good and Bad Ideas
(imgs.xkcd.com)
Alt text:
While it seemed like a fun prank at the time, I realize my prank fire extinguishers full of leaded gasoline were a mistake.
This can be solved by using a napkin
(Or just not caring about the problem anyhow)
Or by cutting it into standard slices. But yeah napkins and apathy work too.