Read these paragraphs from the text.
"Joe found a gas station and pulled in to fill up. They had a direct view of the river. Sunlight dappled the water, which rushed over rocks where shallow and flowed slowly where deep.
Sam opened his door and stumbled out onto the pavement. He stretched out in the beauty that lay before him. He walked down to the river. After filling up the tank, Joe pulled into a parking spot and called down to him.

'This place is incredible,' he hollered."

What is the mood in these paragraphs? Cite specific language from these paragraphs to support your answer.