You become a ghost in their timeline. A teaser trailer for a story they didn't know they were in.
But here is the tease. The hook. The horror. time freeze stop and teaser adventure (maybe)
And that is where the teaser adventure begins. You become a ghost in their timeline
Would you be kind? A benevolent poltergeist who fixes broken things? Would you be cruel? A thief who steals a single second from every happy memory? Or would you be lonely ? Someone who just wanted to stand in front of another frozen person, look them in the eye, and whisper, "I was here. I existed. See me." look them in the eye