Boy unable to escape own shadow

"She returned to the nursery, and found Nana with something in her mouth, which proved to be the boy's shadow. As he leapt at the window Nana had closed it quickly, too late to catch him, but his shadow had not had time to get out; slam went the window and snapped it off. You may be sure Mrs. Darling examined the shadow carefully, but it was
quite the ordinary kind."