Are You suprised ?

E.g. I’ll be sorry, I’ll be truly sorry to leave you here, my friend.

There is a device that is called anticlimax. It is such an arrangement of ideas, in which there is a gradual increase in significance, but the final idea (which the reader expects to be the culminating one, like in climax) is trifling or farcical; i.e. it is a sudden drop from the serious to the ridiculous:

E.g. In days of yore, a mighty rumbling was heard in a Mountain. It was said to be in labour, and multitudes flocked together, from far and near, to see what it would produce. After long expectations and many wise conjectures from the bystanders – out popped, a Mouse! (Aesop The Mountain In Labour)

E.g. This war-like speech, received with many a cheer,

Had filled them with desire of fame, and beer. (Byron)

Antithesis is a SD consisting of two steps, the lexical meanings of which stand in opposition. The main function is to stress heterogeneity of the described phenomenon, to show it as a dialectical unity of two or more opposing features.

E.g. Some people have much to live on, but little to live for.

E.g. I like big parties, they are so intimate.