Answer:
He curses God for allowing such things to happen.
He pinches himself, thinking it is just a nightmare.
Step-by-step explanation:
When Elie Wiesel saw a tuck loaded with children who were about to be burned alive in the crematorium, he first pinched himself to be sure that he was really seeing the event and not just dreaming.
When he and other Jews realized that the same fate awaited them, the men recited the Jewish prayer for the dead while Wiesel wondered why he should thank God even after he saw these things happen. He cursed God, calling Him the terrible Master of the universe.