When you get punched in the gut there are two ways you can react. You can put your fists up and fight or you can run away.

If we're going to be able to react, we need to react quickly,

When he hit that ball, I didn't react. I didn't react, because I didn't know what to do. I couldn't believe he just did that. So I froze. I just froze.

These guys have gotten punched enough in the head to know what happens when they do.

Each tunnel in the sky must react to other tunnels in the same way as it does to keep clear of terrain.

She was the only one that didn't react to me when I was in Nanny mode.