The Haunted House on Broad Ave. Altoona, PA
I was about 8 years old my mom just moved in to a new appartment and while me and my cousin were unpaking we took a break and watched a movie. I was sitting on the couch and saw a waving hand by the stairs saying my name and saying come play with us, I told her but she didn't see nor hear it till I saw it by the sunporch and she saw it. We were both freaked.
A week or 2 later I came home from school and then I saw a headless guy walking through the hallway. I was scared and that house to this very day gives me the creeps when I pass it. The address is 2217 Broad Ave. Altoona, PA 16601, 2nd floor