Karna pulled out of his thoughts as he felt that cloth snatched from his hands. This made him anxious. He thought they would again put that cloth on her eyes.
He turned in Gandhari's arms just to see Dhritarashtra holding that cursed piece of cloth.
He didn't know much about Mahabharata but knew one thing, That piece of cloth is one of the reasons for that catastrophic war. If that cloth is again put on her eyes, Then that means that war too happens and So does his end of dying in it. After all, he thinks no one power to change fate.
*Sizzle*
But fortunately, contrary to his imagination, Dhritarashtra put it in Gandhari's eye but with his spiritual power burned it to ashes.
"..."
There was pin-drop silence in the hall. No one knows what is happening. Even Gandhari who knows him so much, At this point, was stupefied.
No one understands the meaning of his action.
"Gandhari, How much do you love and respect me?"