Put the exclamation point inside the parentheses when it applies to the words inside the parentheses. ... Put the exclamation point outside the parentheses if it applies to the whole sentence. They settled out of court and Jeremy got a million dollars (cash)!

Why do people put exclamation marks in brackets?

This usage is simply a passing note of astonishment at the preceding word (or perhaps phrase). ... This may express real or feigned (sarcastic) astonishment by the writer, or be used to call attention to a surprising aspect of the use of the preceding word.

Is punctuation inside or outside of parentheses?

Punctuation with parentheses is very similar to punctuation with quotation marks. If the information in the parentheses is a separate, complete sentence, the period at the end of the sentence goes inside the parentheses.