Poirot took a quick step forwards.
“You should not do that. Mademoiselle–“
The young woman started nervously at the sound of his voice. The revolver slipped through her fingers. She was standing by the edge of the pool and the revolver fell with a splash into the water.
Her mouth opened and she uttered an “Oh” of consternation, turning her head to look at Poirot apologetically.
“What a fool I am,” she said. “I’m sorry.”
The Hollow by Agatha Christie
‘She was staring, you know, over Mrs Badcock’s shoulder and when Mrs Badcock had
finished her rather silly story of how she got out of a bed of sickness and sneaked out of the house to go and meet Marina and get her autograph, there was a sort of odd silence. Then I saw her face.’
‘Whose face? Mrs Badcock’s?’
‘No. Marina Gregg’s. It was as though she hadn’t heard a word the Badcock woman was saying. She was staring over her shoulder right at the wall opposite. Staring with – I can’t
explain it to you-‘
The mirror cracked from side to side, by Agatha Christie