-When you can fly from Stockholm all the way across europe on the same squawk code, but then from Palermo to Milan you get three different transponder settings
-When "2435
coming down" is standard phraseology
-When ANY PPRUNE thread becomes an excuse for a slagging match between AZ and non-AZ pilots!
(E chi se la prende ragazzi... io ex-AZ lo ero gia' prima...)