She moved her body back a little, hands still tight on the chair arms.

This may be difficult on a chair arm, but it is worth a try.

I shifted my feet from her chair arm and sat up.

He jerked again and the whole chair arm came free.

He set his hands to the chair arms, as if about to rise.

I just hung over the chair arm and tried not to look at the stuff.

He released the chair arms and turned his hands over.

She stood with her back to us, one hand on the chair arm.

He put a hand on each chair arm and raised himself up.

He moved his hands to the chair arms and then clasped them again.