Gordon sighs; he doesn't really know how to explain this. Eventually, though, he says, "I know how fast the things at Black Mesa could run. I had to outrun enough of them. But in the dream I was only about as fast as somebody with a three-year-old's legs could run. It wasn't one of those nightmares where you're moving too slowly to get away, either. It was like remembering only being able to run that fast, there."