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Use "contorting" in a sentence
"Edward stood back, his expression contorting slightly as he watched the young couple discover the sky."
"Creo stared, his expression contorting between horror and fascination."
"I was fully expecting that in contrast to the shrieking flying monkeys that descended on Pharyngula blog over the wafer business discussed there, that there would be some kind of contorting to point out how President Steve's incident was different and special and non-sacrisomething, sorta like how it was ok for him to take the GG's parade salute."