> "electron gas"

Did you invent this? It's fantastic. Lots of people misunderstand electricity as just "tiny little balls colliding with other balls", or think that the electrons themselves must be zooming around the circuit, rather than the wave they participate in.

"Electron gas" sounds right to my ears for these simple analogies. Just like sound oscillates, but still moves from speaker to ear, so too does AC current oscillate, but the energy has a single direction.