Read the following text and then answer the questions.

Fishing at the River

    When I was in Junior High School, my father once took me to go fishing with him at the river on Sunday morning. The river lied across our oil palm plantation. We had breakfast first at home and then left early in the morning by motorcycle.

    When we arrived in our plantation, my father parked the motorcycle under the hut. He asked me to collect some dry wood and dry grass or leaves, When I already collected enough wood and dry leaves, my father set a fire in the center of the fireplace. He said that the smoke from the fire would scare some dangerous animal like bear and boar to come closer to the hut and so it would make us safer.

    After cleaning some wild grass around the hut, my father gave me a hoe and asked me to dig some soil to find worms. When I already had enough worms, I brought it to my father and we went straight to the river. We put the worm on the fishing hook as a bait to catch the fish. As a beginner fisher, I cannot apply the worm on the fishing hook well, and it looked like it was about to fall of the hook, but my father said that it was okay. I threw the fishing hook into the river and waited for the fish to eat the bait, but nothing happened after a while. When I was about to get bored I saw a big prawn was slowly walking in the water. I placed the fishing hook slowly into the face of the prawn and moved it up and down so the worm seemed alive. I never expected it to happen but suddenly the prawn moved its hand and grabbed the worm on my fishing hook. I lift it very slowly and the prawn was still there hanging tight on the worm until I placed it on the ground and I caught it right away with my hands. My father was so surprised to see it. Before we went home, we cooked it at the hut and enjoyed it together.

What did the writer do after seeing a big prawn?