This film is based on a technique formerly called "Facilitated Communication" (FC for short.) Countless experiments have demonstrated that FC does not work, and the messages being typed are completely (and unconsciously) being created by the facilitator, in much the same way as an Ouija Board. No independently-conducted and peer-reviewed (i.e., by anyone who is not part of the FC group) has found any evidence that the technique actually works.
This was demonstrated quite clearly in the Frontline episode "Prisoners of Silence."
In other words, this film and everything Sue is purported to have said almost certainly did not actually come from her, but from the person holding her arm as she "typed" it.
