Being sarcastic not really on but can be rather humourous to rest of office.
Capt - Flight XXX to Ops, can you ask MX if they know how to reset airshow system?
Ops - What seems to be the problem with airshow?
Capt - Airshow currently showing aircraft flying somewhere over Mid Africa
(Flight actually operating trans-atlantic EU-US)
Ops - Ops to Flight XXX, maybe a suggestion to use GPS instead of airshow for navigation.
Radio goes quiet.........