Ouch! I hope he did ok though - I know that they are pretty used to it but it's been 2 times now in the last 2 weeks while leaving the house that I saw a poor flying fox dead probably electrocuted on the wire :-/
Possums are cute but if I forgot to remove my clothes from the washing line they are good for another go on the washing as these little creatures just enjoy peeing on my clothes as they cross the garden on the wire of the washing line hahah!
Enjoy your time in Melbourne