Heard by some seminarians on the same bus as that carrying the Australian bishops to St Paul's outside the Walls, during their last ad limina visit to Rome: "What river is that?" – as the bus carried them over one of the Tiber bridges.
The Rhine flows into the... what?
So much for our successors of the Apostles having even a merely natural level of ordinary education.
Quo vadis indeed!
(Surely Cooees has better sources than I – why haven't they picked this up? How slack.)