One of my favorite TV shows is Fawlty Towers, a 12 episode British production from the mid-70s starring (and co-written by) John Cleese of Monty Python fame. Cleese plays Basil Fawlty, who runs a second rate B&B in Torquay along with his adversary . . . I mean wife, Sybil (Prunella Scales).
In this scene Basil has just discovered that the hamster one of his staff (Manuel, who's from Barthelona) has been keeping for the past year is actually a rat (named Basil) and the local health inspector is on his way.
Enjoy. I like the last line best.