You were there when it happened. When Ron accidentally shot Carl Grimes' eye out. You were standing with him, next to him, holding his hand and everything. You were there. This is how it went. Ron pulled the gun. He was aiming for a Walker, but hit Carl's eye instead since it was raining and it was dark outside.
Within seconds, Michonne's katana pierced through him. He fell down. You watched as the Walkers started to devour him, Rick carrying Carl. Michonne grabbed your arm and dragged you along. It was tragic. A Fifteen year old boy stabbed with a katana after watching his mother and his ten year old brother die. It was a horrible thing to see.
As Michonne dragged you along, you could hear his yells as the Walkers devoured him. The katana stabbing him hadn't killed him, but the Walkers sure would. You struggled against Michonne, but it was useless. She was much stronger than you. The worst part was, was that Ron wasn't trying to shoot Carl. He was aiming for the Walker, and Michonne stabbed him anyway.