At the Puma sim we convinced one group of RAF students that due to notification of a nasty ear infection going around, not only did the communal headsets have to be sanitised before and after use (true), but hotel shower caps had to be worn as well. Later copied at the Chinook sim, too.
Difficult to keep a straight face when you see two heads with elasticated plastic bags bobbing about under their headsets whilst they were trying to deal with a serious emergency.
