Yes, rats in the long tunnel - great danger. I have a European car (Citroen C4) I have had a mouse problem. Started with the windscreen wipers sticking on, then off, then on and I had to disconnect battery to stop them.
Took it to dealer - said cause was big mouse nest and they had been chewing the wires
Now how about the LHC WOW, 27 klms of tunnels for the rats to breed in, all those millions
of wires to chew through.
Just imagine, we could all be blown up because a rat had gobbled up a Higgs Boson and short circuited it to a left hand spinning Quark
Better not let those scientists go into the tunnel with their sandwiches.