Suspense And Shock

In thriller's suspense and shock is a key element. But what is suspense and shock and how is it used?

Shock
Shock in film is a sudden upsetting or surprising event/experience that causes an emotional response within the audience. Typical responses from the audience during a shocking scene are surprise, disbelief, fear and sometimes even relief. Shock is a key convention of a thriller as


Suspense
Suspense is a frame of mind in which a person feels uncertain about what is going to happen resulting in anxiousness and sometimes even fear. Suspense is majorly important within films of the thriller genre as it manipulates the audience into feelings of excitement and and tension which transforms into a form of anticipation keeping the audience on "the edge of their seat".