In what ways does your media product use or challenge conventions of real media productions?

Whilst planning and making our media product we researched the conventions of real media productions and tried to incorporate them into ours. An example of this is how we end the trailer on a cliff hanger. We dont give away too much of the plot, just some basic key events - the voiceover tells the audience that they are sisters and were at one point sharing a close bond, but a certain tragic event has broken that bond. We show clips of Zoe becoming mental, i.e. the scene in the bathroom where she is chanted "I AM EMMA".
We also stick to the conventions by using short clips, the longest no longer than 10 seconds. This is effective in our trailer because it teases the audience and almost overwhelms them with so many. 
Ways in which we challenge the conventions of a trailer is by showing a clip from the end of the film, right at the beginning of the trailer. We understand that this would confuse the audience, but that is our intention, so that it will click by the end of the trailer. The clip we show is the one of Zoe as an elderly woman, rocking back and fourth on a chair in a dark room in front of a fuzzy television screen. We have chosen to challenge the conventions with this because we want the audience to be trying to work out what the relevence of that scene is, whilst watching the entire trailer, because that sense of relief when it finally clicks, makes the audience want to find out exactly what happened.