I guess it happens all the time in crime stories where the detective suddenly remembers a bit of conversation that nags him in some way, then for some inexplicable reason, it's just right there in front of you, like a sign pointing 'here!

She dared not raise her eyes above the level of the tea-table, and she almost expected to see a spot of accusing vulpine blood drip down and stain the whiteness of the cloth.

It is precisely in some of these cases that the subsequentness of the dependent event is not clearly expressed […]

Without words and almost with the seriousness of asylum nurses they at once set upon an unsavoury-looking matron who began to cry out Mediterranean vocables of distress.