OP home alone and heard someone coming up the stairs. Thinking it was her sister, she called out to see if it was her. When she kept getting no response, she went to check and was confronted by a wide-eyed man on her stairs, who had a crazy look on his face. Submit your stories: popmediaagency@gmail.com Visit betterhelp.com/redditexplains to talk to a professional about stress, grief, and other mental health needs.Our Instagram page: @reddit_explains