Im looking at the Solar System display when I hear a child close by shouting at his mum to which she replies No need to bite my head off Ive heard of laughing your head off to laugh a lot and even biting your tongue to be quiet but biting someones head off puts a rather more vivid picture into my mind During a trip to London taking in tube announcements guitar shops and the Science Museum Michael Barton explores and explains the confusing neurotypical world of contradictory signage hidden meanin