Is Hillary Taking "Happy Pills"?

The biggest difference  between Donald Trump and Hillary Clinton in the first presidential debate  is that Trump took the debate seriously and Clinton was on a lark.  I vaguely remember her having an occasional serious expression on her face,  but my primary impression was of someone having a fun time at a party.  I have tried to convince myself that  she was overjoyed at being able to repeat one of her favorite cliches,  but at times it seemed like she was almost about  to giggle

I'm not a party animal, so the closest thing I have to observing someone who is "having a good time" is watching characters on television.  If I saw a tv character behaving like Hillary it would be because she was high on something.