He cracked his knuckles and gazed around the dining room.
He rocked from one foot to the other and cracked his knuckles.
One of them cracked his knuckles when he saw Jeremy looking at him.
"Because I cracked my knuckles on what feels like a door frame."
I stand back and crack my knuckles, ready to take this all the way to the top.
Sometimes he would put the pencil down to crack his knuckles.
Jean cracked his knuckles and prepared himself for things to get interesting.
He cracked his knuckles and began pacing around the room.
You thank your stars I don't crack my knuckles into the bargain.
The Director was standing again, cracking his knuckles and thinking aloud.