Q: This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
The phrase "Hiding behind (or 'watching from behind') the sofa" entered British pop culture, signifying in humour the stereotypical early-series behaviour of children who wanted to avoid seeing frightening parts of a television programme while remaining in the room to watch the remainder of it. The phrase retains this association with Doctor Who, to the point that in 1991 the Museum of the Moving Image in London named their exhibition celebrating the programme "Behind the Sofa". The electronic theme music too was perceived as eerie, novel, and frightening, at the time. A 2012 article placed this childhood juxtaposition of fear and thrill "at the center of many people's relationship with the show", and a 2011 online vote at Digital Spy deemed the series the "scariest TV show of all time".
A:
What popular phrase is associated with the Doctor Who series?