Yes, sometimes they is given news wot is so touching or dreadful it do betray the inner man (or woman).
See Red Ken on the stump when first elected Mayor of London! He up against the massed ranks of a triumphant Labour Party, sweeping all before it in the first flush of the Blair Infatuation.........until they put up Frank Dobson for the job, a skittle for Red Ken to knock over.
But Red Ken not all that confident, see in the first piccy someone has just said they will vote for him, he close to tears of gratitude, he trembling with emotion as he utter his thanks.
Not so in the second piccy wot was taken one second after someone told Red Ken that Chaircat Midge thinking of standing for the job, Red Ken become Deranged at the prospect.
But he need not have worried, it just a wind-up, I not so keen on the idea of Leaving Home wot such a job would necessitate, somebody got to look after Our Creature and Sister Claire. 
Should have gone for the job. There was already a cat at number 10 