I cannot physically do this with any degree of comfort. Youngsters can. I think I can still look along my shoulder, although don't have many reasons to do so nowadays. I used to run a bit - a club half marathon road runner with a PB of 1 hour 19 minutes. The advice from our coach - Ron - was to always focus on the road ahead. "Never look over your shoulder because you cannot control what is happening behind you. In any case, if you do you will probably miss some crack in the pavement and trip over." Wise words, indeed.
Of course, one needs to be careful when looking at a contentious article in the Guardian or New York Times on the Internet that someone is not looking over your shoulder. You might be reported to the Literature Police and made to sit in a cell and read three editions of The National Enquirer.
It is probably a good thing, though, that stone-age people looked over their shoulders, for the continuation of the species. For that generation, the ever-present sabre-toothed tiger was a problem. However, I have seen pictures of stone-age people that suggested a very small neck - almost no neck, in fact. Therefore looking over the shoulder probably presented a few medical issues relating to the sternocleidomastoid muscle.
Have you ever worked in an organisation where you are continuously looking over your shoulder? Many people have reported that they have, particularly in the UK. Is this positive or negative? I would say the latter.
