If I told you I'm a friend of Bill W's requesting a visit from Dr. Brown after a violent

Operation Bright Star, he'd probably think I'd finally lost my mind.

However, all the mumbo-jumbo I just said is full of coded information that's easily understandable

for those in the know.

In fact, the world is full of secret codes hidden in airplanes, jewelry, dating profiles, and banknotes, and today I'm decoding them for your pleasure.

Let's explore a whole load of secret codes you aren't meant to know.

You're listening. You're listening. You're listening. You're listening. You're listening to be amazed.

During a flight, pilots are constantly communicating with the flight attendants and air traffic control to give them updates about the journey.

These messages are usually pretty innocent, however, if there's an emergency, they'll use secret codes to communicate so they don't alert the passengers.

A squawk code is a four-digit number that a pilot can type into a transponder radio device in the cockpit that will instantly relay it to air traffic control below.

The different number combinations can be used to pass

information about the flight, and while different countries use different squawk codes, there

are three main emergency codes that are used all over the world. These universal numbers are

code 7600 for radio failure, code 7700 for any general emergency, and code 7500 for a hijacking.

Code 75000 is arguably the most serious code, as pilots will only use it if the aircraft is being forcibly taken over by aggressors.

The input design of the transponder means the pilots don't actually

say the codes out loud to send the information to air traffic controls so you won't hear a pilot

reporting a code 7500 over the plane's intercom. However, if you overhear two flight attendants, say

the number 7500 on your flight, and they look worried, they're probably discussing the possibility

of being hijacked.

This is pretty scary, but some of the codes used on a plane are a bit less serious.

For example, if you hear a flight attendant mention blue juice, you should know that they

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