This isn't a hoax.
4 seconds sound clip from the Poltergeist (1982) movie soundboard.
You can hear this line at 00:50:02 in the Blu-ray version of the movie.
Quote context
[...]
- It is a way out, but not for her. Tell her quickly.
- Tell her to stay away from the light!
- I don't believe it, but the voice could be coming from a CB transmitter in the house.
- Mommy, there's somebody here.
- No, it's not Mommy. Who is it, Dr. Lesh?
[...]
Poltergeist (1982) Sound Clip
Famous quotes and lines from the movie Poltergeist (1982), featuring short sound clips and sfx which can be used as ringtones or as custom computer sounds.
Actors: JoBeth Williams (Diane), Craig T. Nelson (Steven), Heather O'Rourke (Carol Anne), Zelda Rubinstein (Tangina Barrons)
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