Here are some examples of how to use "hysterically" correctly:
* She laughed hysterically at the comedian's jokes. (modifies the verb "laughed")
* The children were hysterically excited about the birthday party. (modifies the adjective "excited")
* The dog barked hysterically at the mailman. (modifies the adverb "barked")
To make a sentence sound "hysterical," you would need to use words and phrases that convey a sense of extreme emotion, excitement, or nervousness.