But you can get the basic idea from Monty Python's classic movie ... so if she weighs the same as a duck, she must be a witch! They get a big scale and weigh her and a duck; the scale being ...

Dust off your original Monty Python VHS tapes ... he only confirms their accusations by comparing the suspected witch's weight to a duck's. 'We are the Knights who say ni!' ...

We all know the classic scene below from Monty Python and The Holy Grail ... if the woman weighs less than or equal to a duck, she's obviously a witch. A couple of centuries after the age of ...