If you focus your resources behind these, they grow even quicker.

His eyes focused on something behind me, and his face changed expression.

Both aliens had turned slightly to the left to focus those red eyes on something behind her.

Ryan looked up, and for the first time focused on the wall behind Brandon.

At the same moment he focused on the spot just behind Radamand's eyes.

He focused through on to the wall behind them and willed himself to stay calm.

Kelly's mind focused behind closed eyes on the mission before him.

He focused on the roof of the ten-story building behind him.

Stan's eyes slid from my face to focus on Bill's behind me.

Now he saw another woman in those holes, her dark eyes focused on something behind him.