Cliffhangers.

Cliffhangers are sometimes, though not always used.

They are often always used particularly at the end of a series on tv

in order to draw the attention of the viewers and keep them watching. 
In thrillers, they often feature a main character in a precarious or difficult
 dilemma, or confronted with a shocking revelation. 
This keeps the audience interested and keep watching in 
order to see how the situation resolves itself.


For Example:
Strictly speaking The Italian Job isn't classed as a thriller
 although this is a classic example of a cliff hanger in its famous ending.

*Also suspense is built through the reckless,

 careless driving around the mountain edges.