#8: Fire + Fuel = Kaboom
Some safety signs go for long explanations, but this one keeps it short, sharp, and unforgettable. At a fuel dock, it warns: “Absolutely no smoking. Fire + Fuel = Kaboom.” It’s the kind of math problem everyone can understand, with the consequences spelled out in cartoon simplicity.

The word “kaboom” adds a dash of humor while still driving the point home. Instead of dry safety jargon, it grabs attention with a mental image straight out of a comic book explosion. Funny, yes — but also a reminder that one careless match could turn deadly.
