Feel like throwing yourself into the action of something none can stop happening? Mars does, and doesn’t hold back.

Sic orsus aperto flagrantes immisit equos.

Thus, having spoken, he sent his fiery horses into the open.

Sic ("thus" or "in this way")

Orsus ("having begun" or "having spoken") is the perfect passive participle of "ordior," meaning "to begin" or "to commence," in context it refers to Mars.

Aperto ("open" or "exposed") is the ablative singular form of "apertus"

Flagrantes ("blazing" or "fiery") is the accusative plural form of the present participle "flagrans," modifying "equos."

Immīsit ("sent" or "released") is in the third person singular perfect active indicative.

Equos ("horses") is the accusative plural form of "equus."