Little kid logic is so foreign to me now it makes me a little sad.
Another example - we have our nephew stay over sometimes. One night, he did not, absolutely NOT want to go into the room he sleeps in.
We couldn't work it out. He slept there a bunch of other times, no problem.
Tried picking him up to carry him in, but no, he screamed like crazy.
After a long, long time, he settled enough to tell us there was a "BIG FROG" (said with wide eyes, mouth turned down) in his room.
Turns out that over the traffic noise he could hear a frog croaking outside his window. It was a noise we'd all just dismissed.
Opened and closed the window to show him it was outside.
Asked him how big he thought the frog was. Held his arms out as far as they would go. I showed him a video of a tiny croaking frog on my phone. Not the same as the outside frog, but close.
He was ok after we showed him the window was locked, and the frog wouldn't be able to get in.