I was getting the tram home, and the dog was being walked along Lygon street.
Suddenly it ran off from its owner and hopped on the tram. People were trying to tell the driver, but the doors were already closing and the tram pulling away. The ownerless dog ran happily up and down the tram and said hi to concerned people who were unsure of what to do.
At the next stop, which was at a park, the dog jumped off, and went off to do its business.
Public transport dog!