Various parts of the horse's gastrointestinal tract may twist upon themselves.

Smith twisted round upon me, never releasing his hold of the woman.

They were moving now, twisting upon themselves in agitation at the warmth of the sun.

Holmes twisted himself round upon the sofa to get a fairer view of the man's excited face.

Nothing remained in the night but his thoughts, twisting upon themselves.

She twisted round upon the floor and stared up into my face.

There was a crunched trail ahead twisting and turning upon itself, seeking the best passage.

Willingly, his heart twisting upon sorrow's spear, he turned away.

The Shadow's form seemed to twist upon the sloping roof.

North of the prison, the road began to twist back upon itself like a wounded snake.