Action is the easiest Fountain element — anything that isn’t parsed as another element is considered action.
Sometimes you may write some action that will be unintentionally parsed as dialogue, for example:
Jack examines his shopping list... BLACK SHIRT BLACK PANTS EXPLOSIVES MAP
BLACK SHIRT would be parsed as a character, who then shouts
“BLACK PANTS!...” We don’t want that. To prevent this, prefix the
first line with
! (exclamation mark). This is known as a
!BLACK SHIRT BLACK PANTS EXPLOSIVES MAP