Visible crew/equipment: In the final shot of the opening sequence (before "the Interview" title shot), at the top of the frame, you will see the helicopter blades twirling. (Visible on fullscreen DVD and VHS.) (00:02:43)
Visible crew/equipment: When Danny runs with his tricycle through the corridors before stopping in front of room 237, the shadow of the camera chasing him can be seen on the tricycle's backrest. (00:28:50)
Visible crew/equipment: At the beginning of the movie, Jack knocks on Ullman's office door and you can see Stanley Kubrick reflected in one of the square window panes behind Mr Ullman. Do not confuse Kubrick's reflection with Jack Nicholson's. (00:03:39)
Answer: Delbert Grady has always been at the hotel, just as Jack Torrance has...however, "Charles Grady" was one incarnation of the hotel's "caretaker", which Jack Torrance currently is. Delbert, evidenced by his appearance, occupation, and archaic racial views, has been with the hotel since its turn-of-the-century inception, just as Jack, in the photo at the end, has been. We don't know what "spirit-Jack's" function in the Overlook is...we only know that the present Jack (whom Delbert is talking to) embodies the "caretaker" who has always been there, just as Charles Grady did in his time. Delbert refers to his wife and two daughters, whom he did not murder...his "caretaker" version, Charles Grady, did that.