The recording took three days. On the second night, during the scene where Watney watches the rescue craft miss him, Bala improvised. He didn’t shout. He whispered, voice cracking:
"Mannu pesum. Aanal athu mothalil un kaiyai thodanum. Appothan athu un idhayathai purinthukollum."
After the show, an old farmer walked up to Vetri at a preview in Madurai. The farmer’s hands were cracked like the Martian soil. He didn’t smile. He just said:
"Indha padathula, payir valartha aalu mattum illa. Payir valarkka vendiya manasukku avan kural kodutha aalu nee thaan."
So Vetri rewrote Watney’s monologues. Not as punchlines. As thadavu —struggle. He changed "I’m going to have to science the shit out of this" to "Indha mannoda kadalai naan arivinal pidikkaporen" (I will wrestle this soil with my knowledge). The word pidikkaporen —to grapple, to hold—felt real.