How DO you get a pony in a Mini Metro?

http://news.bbc.co.uk/1/hi/england/norfolk/4845210.stm

Officers find small pony in Mini Police patrol officers who stopped a stopped a Mini Metro believed to have been involved in a road accident found a Shetland pony on the back seat.

Officers found the miniature pony after stopping the vehicle in the county during a routine patrol.

The incident was among details of traffic offences listed by Norfolk Police as part of a new road campaign.

The campaign aims to help educate drivers in an effort to reduce the number of accidents in the county.

Now, can someone please tell me... How DO you get a pony in a Mini Metro?