Bhagavad Gita, Chapter 11, Verse 35

Sanjaya said: Having heard that speech of Keshava, the diademed one (Arjuna), with joined palms, trembling, prostrated himself, and again addressed Krishna in a choked voice, bowing down, overwhelmed with fear.

Fear this real is described plainly here, a trembling body and a voice that won't hold steady.

Sanjay's narration doesn't smooth over what Arjun is going through, it names the shaking and the faltering directly. This honest account sets up everything Arjun says next.