How did Ponyboy scare Dally back at the church fire?

In Chapter 6, Ponyboy, Johnny, and Dally return to the church and see that it is on fire. Ponyboy quickly hops out of the car to see what is going on and runs over toward the nearest bystanders to get information. After Ponyboy and Johnny run into the burning building to save the children, Ponyboy exits the fire before the building collapses. When Ponyboy lands on the ground, he turns back toward the church after hearing Johnny scream. Ponyboy attempts to run back into the burning building, but Dally clubs him in the head, knocking Ponyboy unconscious. Ponyboy scared Dally when he decided to turn around and go back into the flames. Dally knew that Ponyboy would be putting himself back into a life threatening, dangerous situation and was scared that Ponyboy would die if went back into the burning building. Dally made the quick, effective decision to hit Ponyboy over the head in order to prevent him from going back into the church, which saved Pony's life.