How does Ralph react to the first hunt in which he participates?

Ralph reacts to the first hunt in which he participates with composure and courage. When the boar is running towards him, Ralph is able to "measure the distance coldly and take aim." He then manages to hit the boar in the snout, making it change direction. After this moment, Ralph gets caught up in the excitement of the hunt and becomes "full of fright and apprehension and pride." Ralph also repeats, "I hit him! The spear stuck in" three times, suggesting not only his aforementioned pride, but also his excitement, and perhaps even his incredulity that he managed to keep his composure and aim so precisely.
After making sure that the other boys know of his success, Ralph "sun(s) himself in their new respect and (feels) that hunting was good after all." Later he gets carried away, along with most of the boys, with what starts out as a play hunting of Robert. Indeed, Ralph is described as "screaming and struggling with the strength of frenzy." These latter reactions indicate that Ralph is, for a few moments at least, as susceptible to the "frenzy" of the group mentality as are the likes of Jack and Roger. Ralph's reactions suggest that the primal instinct is an inherent part of each of us.

In Chapter 7, Ralph joins Jack's hunting expedition and almost kills a pig. As the boys are walking through the forest, they hear the sound of running pigs and suddenly a boar bounds onto the pig track heading in Ralph's direction. Ralph instinctively raises his spear and throws it towards the boar. Ralph manages to hit the boar on the nose with his spear, but it continues to run into a covert. Even though Ralph does not kill the boar, he is excited and enthused that he was able to hit it with his spear. When Jack and the other hunters arrive at the scene, Ralph happily elaborates on how he was able to hit the boar in the nose. The boys then encircle Robert, who pretends to be the pig and they violently begin to poke him with their spears. Ralph is quick to participate in the reenactment and has fun acting like a savage. Overall, Ralph is excited and thrilled to participate in the hunt. Like the other boys on the island, Ralph enjoys hunting and has an inherent affinity for violence and excitement.