I would like to know the name of a movie and I would like to request it.

The movie is about a women, who has a son which she loves very much. But from one day to another people say that she never had one. Everything about her son dissapears, etc. She investigates and finds out that something is going on. At some parts in the movie people are sucked into the sky and stuff. In the end it seems that it all was an experiment to see the connection of a mother and a child. It's a bit of a mystery, maybe a thriller movie, what is the name?

Sounds a bit like Jodie foster's movie Flight Plan although you never said the movie taken part in an aeroplane that might have been a slight clue to the rest of the members to help you, Am i right (i could still be wrong). Anyway don't double post the same threads in other topics which is why i deleted 1 of your posts.

is it this movie

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I believe the movie you are discussing is The Forgotten (2004)

A grieving mother, Telly Paretta, is struggling to cope with the loss of her 9-year-old son. She is stunned when her psychiatrist and her husband tell her that she has created eight years of memories of a son she never had. But when she meets the father of one of her son's friend who is having the same experience, Telly embarks on a mission to prove her son's existence and her sanity.

THANKS! That is the one. I'll write it down!