The Spooky Child By the Cloth Rack
The “Insidious” camera follows the mother Renai about the house as she does laundry in this first normal scene. She abruptly stops in her tracks, and we continue to follow her outdoors as she looks through the window and notices an odd young boy dancing in her living room.
Source: FilmDistric
We didn’t see that she had just passed him on her way out. He was hiding among the jackets on a coat rack in a shadowy area. It’s one of those frightening “blink and you’ll miss it” situations that you only realize too late.