Berlin, Germany. Passenger Jarkko Riihimaki said: 'This was supposed to be a normal trip home with the S-Bahn.
'After one stop, a girl - pretty conventional looking - comes in with a pony. Yes, with a pony!
'I don't know what to say about the whole thing.'
A S-Bahn spokesman failed to see the funny side of the incident, saying the horsey passenger clearly violated its travel policy.
Spokesman Burkhard Ahlert said: 'One may smile but according to our transport regulations, this is clearly not allowed.
'This clearly violates our conditions of carriage.
'A horse can be dangerous. What if it escapes? The S-Bahn is no place for such animals.
'We have informed the police already.'
He said that it is believed that the pony belongs to a circus troupe that collects donations.
