r/TrueScaryStories: OP tells two stories. In the first one, they are hanging out in their home at night when suddenly there is a bright flash right outside their window as if someone took a picture of them.

In the second story, OP and their siblings are at home when they suddenly hear a loud rattling on their doorknob, as if someone is trying to get into their kitchen. When they go to investigate, no one is there...