The clown approaches with a balloon. Maybe we take it and share a smile, maybe the clown uses the string to strangle us, maybe we lose our senses and stab the clown.
A stalker watches a family for months. The stalker gains the confidence to move into the family’s home. For reasons undetermined, perhaps the exposition of their “haunting”, the stalker becomes a murderer. After the murders, the evil or insane murder lives in the home for a few days as though it is their own. Wears the clothes of the victims, eats their food, sleeps in their bed.