I highly doubt that there's actually a ghost mustard, maybe a camera anomaly?
Things have been falling with no force behind it, (Something will be sitting on the middle of the table, and I'll leave, come back, it's on the floor across the room) My computer will shut itself down for no reason, things will disappear and reappear in my closet, (Plates and bowls, and once my X-Box) and now that picture... There's no way that's happening by coincidence...