Jack Shepard's rage-filled smile

Smiles, like donuts, can be filled with various things.  Some are filled with friendly hopefulness.  Some are filled with giddy abandon.

Some are filled with rage.

Matthew Fox does one hell of an angry smile.  He's been doing it since Party of Five but not nearly as menacingly as he did it on Lost.

the best part is when the angry smile

turns into the angry smile/look away/smolder seethe

Sometimes there's even a pissed-off chuckle.

He also does a fantastic disappointed head shake.