Subliminal Messages

We have decided having discussed certain horror films that one of the scariest films of all time is the Exorcist. One of the big things that the makers used to make the film scarier is subliminal messages. Some have caused controversy and some have caused humour, we have decided to put in a subliminal message in our trailer and we wont mention where it is, some people probably wont notice it but if it works then it will be worth it. We have not decided what type of message we will put in our trailer but there will be one.