And then he began to laugh in a peculiar way of his own which was both violent and soundless. His heavy reclining body, draped in its black gown, heaved to and fro. His knees drew themselves up to his chin. His arms dangled over the sides of the chair and were helpless. His head rolled from side to side. It was as though he were in the last stages of strychnine poisoning. But no sound came, nor did his mouth even open. Gradually the spasm grew weaker, and when the natural sand colour of his face had returned (for his corked-up laughter had turned it dark red) he began his smoking again in earnest.
Mervyn Peake, Gormenghast
laughter, spasm