Hospital guests being unruly isn't too unusual in itself - but chasing staff and knocking down doors is terrible behaviour altogether.

CCTV footage has been released of an ox running loose through the halls of a hospital in Trajano de Moraes, near Rio de Janeiro. 

Staff escape to safety as the animal approaches, knocking a door off its hinges. No one was injured during the incident and damage was minor.

Oxen are common in the mountainous region, and a lack of necessary fencing and security was to blame for this one finding his way in.