Opening sequence- textual analysis of Limitless

As part of my genre research, I had to textually analyse three opening sequences to help me create a clear idea of what conforms to thriller genres. The analysis of the openings will make me more knowledgeable on what techniques are used in thrillers and how this creates an effect upon the audience. 
This research will help me and my group when creating the pitch for our own thriller opening sequence.

Limitless
This opening scene created mystery throughout the sequence causing the audience to ask questions. (Why is he standing on the edge of the building? Who is at the door?) The opening made you ask lots of questions about the main character and intrigued the viewers to watch more. The male character was neither clearly represented as an protagonist or antagonist creating confusion and mystery about his role in the thriller. The use of the voiceover told us the most information about the character giving an insight into his thoughts and feelings, helping the audience retrieve information about the extract. When looking at media language for my extract I may consider using sound such as a voiceover as I think it is effective in showing the characters emotion and more interesting than dialogue which is most commonly used. The location in the extract was shown to be a busy/hectic but the use of ariel shots and establishing shots from the top of the building helped create a feeling of isolation and made the character look lonely even though the city was not deserted. The indent used in the extract were shown on a black screen then followed by abstract titles. The dramatic titles appeared over the footage of the city with sound that matches the title. The titles were one of the strongest points in the opening of the Limitless extract with the smooth transition from one car window to the next along a line of traffic in the city. Also, the narrative starts off at the peak, this is a conventional technique often used in  thriller genres. By starting at the peak in the opening sequence the audiences attention is grabbed straight away and intrigues them to watch more, thus serving the purpose of a opening sequence!