...not only about what one says, but about
FACIAL expressions, autonomic reflexes.
The Big Bang Theory Season 2, Episode 1
...and did so
using a stern FACIAL expression.
The Big Bang Theory Season 4, Episode 24
Forgive me.
I'm not adept at reading FACIAL cues.
The Big Bang Theory Season 3, Episode 4
It requires 34 FACIAL muscles
and 112 postural muscles.
The Big Bang Theory Season 4, Episode 21
I could deduce by his FACIAL expression
and body language that he was sad.
The Big Bang Theory Season 10, Episode 16