Suspense and Shock. 

Suspense and shock can be easily mistaken, yet there is a big difference. Think of a scene in a film set in an ordinary everyday place, for example, a cafe. There are people working in the cafe, people eating in the cafe, tables, chairs etc.
The camera then reveals to the audience that there is a bomb placed somewhere in the cafe. So now the audience is expecting there to be an explosion, but suspense is built through them waiting for it to explode. 
THIS IS SUSPENSE.


Now think of the same scene set, in the same cafe, people tables etc..
but this time, with out any warning or revealing there is an explosion out of nowhere.
No one was expecting the explosion to happen, and maybe even made
the audience jump as they were watching it.
THIS IS SHOCK.