I'm even chuckling right now thinking about it.
The 2+ hour train ride from Lausanne to Basel last month provided a worthy subject. First, the guy spent about ten minutes "digging for gold" - that, I tried to ignore. However, soon the eyes grew heavy, and the head began to nod.
I got my camera ready.
A couple of minutes later, Mrs. TBF said: "NOW!"
Another one for the "falling asleep in public" collection. They go into the file with this one from somewhere over the Atlantic in January 2007, and this one from Tokyo in October 2007.
Maybe one day I'll publish them all in a coffee table book