The way to explain it is, look, electricity. The free electron in the copper atom breaks off to circle the next atom, taking the charge along the wire.
9 seconds sound clip from the Attack of the Crab Monsters (1957) movie soundboard.
You can hear this line at 00:42:42.654 in the DVD version of the movie.
Quote context
[...]
- You have destroyed McLane and all of his party.
- You have destroyed them and tried to destroy me. This, mes amis, was one grave mistake.
- Molecular structure of this crab is entirely disrupted. There's no cohesion between the atoms.
- Apparently we have one of those biological freaks resulting from an overdose of radiation poisoning.
- It's like a mass of liquid with a permanent shape.
[...]