the scene: standing in the queue to top up oyster card. 3 seemingly inebriated young men, let us call them london underground (LU) clients, are complaining to a staff member of the london underground (SMLU) that their tickets are not letting them in.
SMLU: the ticket assumed that you had completed your journey
LU client 1: we got lost before we completed our journey in the allocated time limit
LU client 2 (in most incredulous voice he can muster): it assuuummed...it assuuumed that we had completed our journey???
SMLU: you can't get lost for 7 hours...
LU client 2 (still in incredulous tone): oh f*** you mate, this is london - you can easily get lost here for a couple of days!!!