Gordon Brown in laughing shock

Twice in the past 24 hours I saw him on telly laughing, in what appeared to be an entirely genuinely manner.

It's a bit frightening, like the mad uncle who has been released from the cellar and is being dosed with happy pills. sidling up to you and saying "Little child, little child, would you like to see the skinned rabbits I keep in the shed?".

I suspect he's seen some polls and the impact of the LibDem advance on the Tory advance....