He forgot his keys and thought there was no one home.

His message (interpreted by the computer) is that he has forgotten his keys.

"We don't want to frighten everyone in the world who sometimes forgets his keys," he said.

One day, he forgets his keys and locks himself out of his flat.

Maybe my parents needed me because something had happened; maybe somebody had forgotten their keys.

This was a common trick of other residents of the building, whenever they had forgotten their outside keys.

Nor is there ever a mitigating sense of an outside world in which people get up in the morning, go to work, forget their keys.

He had forgotten his keys and attempted to enter his home by climbing through a window.

The rest of them are up there," she said, "but I forgot my damned keys.

Only reason I'm here is I forgot my keys and had to use the back way in.