It’s not always just one moment that signals political demise.
But sometimes it is.
For John Hewson, it was answering a question about the theoretical GST payable on a birthday cake.
For Mark Latham, it was too firm a handshake outside a radio studio.
For Kim Beazley, it was getting Rove McManus and Karl Rove mixed up.
For Gordon Brown, it was not knowing when the microphone was still on.
Only brave pundits would have forecast a Labour victory, now it should be interesting to see if they can safely run second.