He was turned again and felt the edge of a seat behind his knees.

The worst of it was the area behind her left knee.

One arm went behind her knees, and she was swung up into his arms.

I had to push the chairs up behind their knees.

A chair came up behind John's knees, and he just about fell backward into it.

I wanted to take a step backward to make it less obvious, but there was a chair behind my knees.

Hook one foot behind your opponent's knees and down he goes.

Some of the swelling is going down behind my knee.

The only opening was a little spot behind his slightly bent left knee.

If he doesn't go down, you help him along with your toe behind his knee.