As anyone knows there is nothing more mind-numbingly boring than waiting in a queue at the local outpatients. Thankfully this is not something I have to do on a regular basis, but in the days when I was incubating bambinos I spent manys a dreary hour at the (block booked) antenatal clinic. There were too many squealing toddlers around to concentrate on reading, so I used to bring my knitting. Many the baleful look I received from the other pregnant mothers which I interpreted as distaste for the multi-coloured stripey jumpers I was knitting on circular needles. I now know their antipathy was for my reckless disregard for their health and safety. Perhaps they might accidentally trip and fall upon my needles, causing them to spontaneously abort. Maybe I'd take a pre-eclamptic fit and put somebody's eye out in a frenzy. Or I could have ripped the stripey woolly off the needles and used them to garrotte some obnoxious child.
It's no wonder Congleton War Memorial Hospital in Cheshire has, on health and safety grounds, banned knitting needles from its waiting rooms and wards.