I have written about movie tropes such as the the tell-tale cough of death and the bullet that throws a 200 pound adult across a room. I was reminded of another while watching my sons play with hand held walkie-talkies.
The little boy on the other end says “Over and out!” after each transmission. He’s seen it on TV and movies a thousand times. Soldiers do it. Pilots do it. Secret agents do it.
But no one in real life does.
“Over” means that you have finished your message and are expecting a response. “Out” means you have finished your message and are ending the conversation. “Over and out” is thus an oxymoron.