The stock market has been quite the roller coaster in the last few weeks.
(ALSO roller-coaster) an exciting entertainment in an amusement park, which is like a fast train that goes up and down very steep slopes and around very sudden bends
A situation which changes from one extreme to another, or in which a person's feelings change from one extreme to another
An amusement ride consisting of a buggy on a track that rises and falls and twists and turns