Complex sentence: Sarah and Casey finally convince him to go to work, but in his distracted state Chuck loses control of The Intersect and threatens a Thai customer in her native tongue, and kicks Lester in the face before Sarah arrives with news about Devon.
Split into simpler sentences: Sarah and Casey finally convince him to go to work, but in his distracted state Chuck loses control of The Intersect. He threatens a Thai customer in her native tongue, and kicks Lester in the face before Sarah arrives with news about Devon.