Can anyone shed anymore light on these ghostly photos

I was kindly sent the following photos from Sharon who has been having problems with here bedside lamp, as in it turns itself on at night, she thought it faulty so replaced it with another, same thing happened so yet again she got a replacement, three lamps and it still turns itself on, Sharon even employed the services of an electrician to check things out, but nothing seemed wrong.

So one night Sharon decided to take some photos, the light turned on, she sat up, turned it off and quickly took some snaps, she says that the room was pitch black while taking the photos, but the results certainly show something.

Sharon also mentioned that other strange things have happened at her home, such as items going missing, all of them hers.

Sharon used an Olympus Fe-210 digital camera to take the photos, the exif data indicates the exposure times were around the 4 second mark.

I checked over the photos but I'm not the best at analyzing this kind of thing, what I found interesting was that what ever it was, it's being either illuminated from beneath or casting light down, also in the first photo there seems to be two directions of movement which seems a little odd for it to be caused by motion blur.

I was wondering if anyone else could shed any more light about what may have caused these, so if anyone could provide an answer or more information for Sharon that would be awesome.

Sharon's Photos kindly used with her permission.