What is notable about the sequence “khudhūhu fa-ghullūh … thumma …”?

Division of Surahs into Verses, Qur’anic Rhythm, and Verse Endings

• Successive brief commands convey an intense, ordered scene
• Treat successive commands as a two-hemistich poetic construction
• Read thumma as inserted solely to maintain rhyme
• There is no progression or meaningful ordering