I remember there being another movie from/about Luigi's Mansion..
It was an FMV, and I think I saw it on IGN, before the GC came out. I can't remember if this is the beginning or not, but I do remember that it went something like this..
According to the camera angle, we are inside the front hall of the mansion. Luigi opens the front door, as the moon casts his silhouette onto the floor infront of us (we can't see anything but his shadow on the ground), he closes the door, slowly walks in, then stops about halfway across the entrance hall. The camera pans (or moves) up a little bit to show that we are seeing one of the Mario Bros (keep in mind that at this time, people thought we were seeing Mario..), and then the light comes up a little bit to show that we are seeing not Mario, but Luigi.
Luigi then turns to the camera for a second, turns back around, and is scared by a ghost (just like in the FMZ at that site..) I wish I could see that movie again.