Walking down stairs while looking at phone screens has overtaken walking down stairs reading broadsheets (I only partially jest, stairs do feature very highly i

Walking down stairs while looking at phone screens has overtaken walking down stairs reading broadsheets (I only partially jest, stairs do feature very highly in actuary tables: http://news.bbc.co.uk/2/hi/health/790609.stm http://news.bbc.co.uk/2/hi/health/790609.stm , more than 1000 per year in the U.K.).