It is your sixth flight of the day and your tired.  You finally get to your cruising altitude and you are ready to relax a bit but you need to make "the announcement".  Starting with "Good evening ladies and gentleman", you begin by thanking them for flying with you, then you start to ramble about the weather at ... Oh no, you forgot your destination.  Then the fun begins.  You begin to frantically search for a piece of paper work that lists your destination.  Forget that you had programmed the navigational computer before you left, you just can't remember.  The other pilot knows your predicament because they have done it also.  Of course they are not the least bit helpful at this time (they have even gone so far as to hide any indicators of your final destination).  They just want to watch you sweat. You get pretty creative at that moment. However, there is pay back which usually results in the next scenario.

You are flying along minding your own business, and yes it usually happens late at night, when you hear "the announcement" starting on the air traffic control (ATC) frequency.  A couple things to keep in mind.  When someone is transmitting on a frequency, it blocks any other transmissions so no one outside of that cockpit, including ATC, can tell them to stop.  Also, when one goes to make passenger announcements, the "announcing pilot" turns his link to ATC off and turns on the link to the cabin speakers.  In theory, one pilot talks to the passenger with no feed back from ATC and the other pilot talks to ATC with no link to the cabin.  If you think the scenario through, you will conclude that there is one person who knows who is making the announcement and has the ability to stop the embarrassment: the OTHER pilot in the cockpit because they hear it when they should not hear it.

If you are on GOOD terms with the other pilot, they will turn to you and give you "the stupid grin" as if to say "Hello, anyone home?"  You immediately realize what you are doing and stop.  If you are not so good terms with the other pilot, well, the announcement goes on forever. At that point, you know it is either a Captain getting even with a "hot shot" First Officer who knows everything or a First Officer getting back at a "crusty old Captain" who knows everything.  One should be careful when purporting to know everything.  Juvenile, yes, unprofessional, probably, but when you are sitting in the sky with not much to do, it CAN be funny!

So remember two things: think before you speak and don't come across as knowing everything.  These should help you avoid finding yourself in the unfortunate situation of: "Good evening ladies and gentlemen..."