"Hi, I just joined Core 77, and this is my first comment to the first article I read on here, and I must say I love your questioning. For your question regarding whether the fire extinguisher should have some kind of instructions on it in case people won't know how to use or activate it, I don't think that the answer to it is instructions. My feeling is that (although I've never used one during a real fire), people wouldn't try to read the instructions on a fire extinguisher, step by step, while there is a fire spreading in their place. You simply try to be as quick as possible, and therefore act intuitively: you pull the pin to be able to activate it, etc. Performing these kind of actions don't require you to learn how to use a fire extinguisher; the user is very well accustomed to performing these actions as they have performed similar ones on different objects or tools. So I believe that the key is to design a fire extinguisher which won't require any instructions to be read. Fire is an emergency, perhaps a time where the user may not be able to cool-headedly think normally, meaning that they shouldn't have to learn about what they have to do. Of course, this raises an interesting thought. I understand your concern about throwing a glass object; even if you own the place, you may prefer not shattering a glass object into pieces in your house if the fire is not an important threat. But I think that Samsung was trying to do what I just in the previous paragraph. What they created requires a single action: ''throw''. Its interesting that if you were to give instructions to someone, it requires only one syllable to come out of your mouth to stop a very harmful danger. Wow, this was a wordy response, sorry if its not how things go around here. Again, first comment :)"