He crowded the American against the wall and drove his knee in and out again, harder this time.

Without so much as hesitating, she whirled round, driving her knee between the man's legs.

She came in hard, screaming all the while, driving her knee into his throat.

He jumped on the bigger man's belly, driving his knee down hard, then again.

The driver then drove his right knee into the man's groin.

And the Explorer drove her knee into the man's testicles.

She did it again with every intention of driving her knee to his chin.

He drives his knee into Barnes's face, careful not to get any blood on the orderly's uniform.

He then picked me up and drove his knee straight into my balls.

And as he did so, I drove my knee with terrific force up against his jaw.