falling asleep on the train

I really admire the train drawings of Lynne Chapman, one of the Urban Sketchers.  She does fantastic drawings of people on trains, mainly when they are asleep and unaware.  When I saw this lady nod off on the train from Dorking, I grabbed my sketchbook to have a go.  Her head fell further and further down as she dozed and then she would suddenly bring it back up again when the train arrived at the next station.