When I lived in the city with my boyfriend, a lot of weird things happened around the house for awhile when we were all moving in. At first I didn't think of any of it as 'paranormal', because it just started off as creaks and bumps and pops, and our house was well over 80 years old in the middle of the city. My original explanations were usually simple like humidity, age, or even rats. But then it started sounding like other people were home when I should have been the only one there. (This story is credited to a person named Skella.)