Hey klaus, nice to see another fellow Swiss

are you really 62 yo? Don't want to offend or anything, but you could be our most mature member

if it's just a joke, it's not funny
As for fire extinguisher, the last time I was in the army we did a whole day training with fire extinguishers, and well, the small ones you fit in your car are simply USELESS
One of those big ones (1 meter) high usually last max 10 seconds or less