Data on a Train

http://www.informationsecuritybuzz.com/daily-commute-mean-data/

The latest intelligence on Al-Qaeda, a high profile Child Protection
report and plans for policing the London 2012 Olympics; three very
different documents with two things in common: firstly, they all
contained highly confidential information and secondly, they were all
left on a train.

Or maybe "Strangers on a Train"

Our latest research reveals that two thirds of Europe’s office commuters
have no qualms about peering across to see what the person sitting next
to them is working on; and more than one in ten (14 per cent) has
spotted confidential or highly sensitive information.