A young Aviator was being ramp checked by a CASA FOI.
As the FOI walked to the door of his Cessna, flipping open his ticket
book, the young aviator said, 'I bet you are going to sell me tickets to the CASA Flight Operations Inspectors Ball.'
He replied, 'CASA Flight Operation inspectors don't have balls.'
There was a moment of silence while the young aviator smiled, and the FOI realized what he'd just said.
He then closed his book, got back in his vehicle and left.
The young aviator was laughing too hard to start the aeroplane.