Conventions of a thriller

In a thriller there are certain conventions built up that make it that thriller genre such as :
a build up of action
creation of fear/apprehension/anticipation/unsettling felling/confusion/and doubt over a character
A certain mood or atmosphere throughout the film
Dark shadowy atmosphere(use of light and dark images
Delay in shwoing the face of a significatnt character,or the action or an important event be firs showing the ahnd of the character for instance or a reaction of someone watching the event
Creation of suspence using music
Morally ambiguous central character
Realisting settings to create a sense of

the unusual

occruing within a normal setting
Flashbacks
Hero(ine) in situation of threat
Red herring
Twists in the storyline