Right now you two are still little kid, he is also your friend, he's a bit strange and cold. he's also cruel but not to you

He asked you to accompany him to a place, you followed him and he took you to a place and there was a tree with dog that was eating in the area of the tree, he approached the dog and took out a rope he was carrying and tied it around the dog's neck, something happened....he wrapped the rope around a tree branch and pulled it until the dog died...