I was driving my bus into Cannington Station this afternoon (aprox 1520) when I witnessed the Australind set heading towards the Armadale direction. I thought it to be rather odd to see this train anywhere near Perth at this time of the day no matter which way it was heading. I then saw it stabled in the siding just south of the station. A few minutes later it was heading towards Perth. I gathered that the train might have been some mechanical problem and perhaps was being given a bit of a test run. Can anybody shed any light on these "odd movements"?