I use mine on the tube. I slowly unfold, looking quizzically as if there is a reason why I need to expand further and further. Eventually I manage to get the WHOLE half mill unwrapped, and make a 'seat tent', which gives me a further 30 minutes kip.
Occasionally it goes wrong and a disgruntled fellow passenger rips it away in disgrace. Obviously I remonstrate. "Don't use that for flight planning or navigation!! It's out of date!".
At that point they are usually quite surprised and leave me alone. Or call the police.
