In spite of being a fairly avid Dr Who fan, I only realised this morning that 'Torchwood' is an anagram of 'Doctor Who' (courtesy of the Guardian TV reviewer - I didn't work it out for myself ). This reminded me of the fact that it took me about 12 years of watching Neighbours to realise that it was an anagram of Erinsborough. And I'm a bloody crossword buff!
So come on, fess up - tell me things that all you clever folk have not realised for years and have made you feel like a fool when you finally 'got' them.