What are beavers then?
A kind of giant Canadian waterproof guinea pig, but that's not important right now.
They're when Davie Dimmers[1] tips sulphuric acid into the moat around the EuroDisney Cinderella's Castle to kill the algae, and they end up with a mysterious ~2V DC bias on all the earth wiring that keeps tripping the circuit breakers.
[1] Super top head theatre techie.