A woman moving around on the floor during a seizure is an example of having writhed on the floor.
A rabbit writhed in its claws, screaming in terror.
His eyes went to Xander, who writhed in pain on the other side of the roof.
She clenched her abdomen, gasping as the creature writhed with enough power to ripple her skin as Memon's did.
Around the edges of the picture people writhed in agony, the flames melting their skin, the smoke filling their lungs.
It liked the feel of Fred as he sinuously writhed on top of it, and sabotaged Shaggy 's vocal chords.