A sign that made me smile, "Hoei" is a bit difficult to translate in english but "Huy"comes close to it. I wondered why that sign with the flames was there and found out that "Hoei" stands for the "Amsterdam fire alumni association". "Hoei" is an expression the fire workers use when a command is given to each other and the last word is Hoei, the receiver responds with Hoei, as a sign he has understood the command. So a kind of "ok".
The sign was attached to the fire department and a fire truck with alarmbells was passing by a few moments later.
Linking to Signs, signs