So when I was a teen I worked as a theatre technician during summers at The Georgian Theatre Festival.
One evening I was sitting in the hall backstage before any of the actors etc had shown up. It was just us techies doing pre-show set up. I was watching my fellow techie Lauren ironing some costumes. She had set up the ironing board in the musicians' dressing room. We were chatting. Just chillaxing.
Now in theatre the word "strike" is used as "remove". So one strikes a set, for example, at the end of the show. If there's a chair where it shouldn't be someone might call out, "Hey, could someone strike that chair?"
That kind of thing.
With that in mind:
The technical director came around the corner, up to us. It was getting close to when the actors etc would be arriving.
"Hey Lauren," he said. "Could you strike the iron and board and stuff? The musicians are on their way up."
"Okay," she replied.
He walked away and she unplugged the iron and picked it up, accidentally touching the bottom.
"Ow, that's hot!" she said.
And I sat there, having observed all this, with my jaw on the floor.
"OMG, Lauren," I said, "do you realise what you are doing?"
She just looked at me.
"You're striking while the iron is hot."
Now unfortunately she had never heard that idiom before, so I had to wait to go home and tell my English teacher parents about it in order to have someone to share the awe of the moment. But I'll never forget it. It's not just that she was literally striking while the iron was hot. It was also that the technical director had said "strike" and she had actually said "hot". It was . . . perfect.
And yes, this is the kind of thing that just makes my life.
So what about you guys? Have any of you witnessed an idiom/saying/metaphor come real?