Another thing about Poltergeist; The film was released in 1982, but the little boy oddly has a poster on his bedroom wall for Superbowl 1988. There's no explanation anywhere for why he would have a poster for an event that would not take place for 6 years.

Superbowl '88 took place on January 31... the same day the little girl that played Carole Anne got sick (she actually died the day after).