Why are you trying to stifle your laughter in a serious situation

A person is suppressing their laughter in a solemn setting. They are seated in a room that looks cold and official, possibly a conference or a courtroom, with long wooden tables and high-backed chairs. Their mouth is tightly closed, cheeks slightly puffed up as they are forcing back a chuckle. Their eyes are sparkling with barely restrained mirth, glancing down to avoid attracting attention. Their hands are fisted and held just below their chest, their body tense as they strive to compose themselves.