Millie has just found out the prank is off and she is calmly talking to George about the fun they are about the have on their boat trip.
Beautiful, lush setting. The foliage is clear and dense, giving it a wild but appealing mood. The river is clear, and sparkling in the bright sunlight. The characters are being kind to each other after deciding not to go through with the prank. (Marty is the only one who thinks the prank is still on, or at least he wants it to be)
Clyde comments on it being a nice day. Wide, establishing shot to show the calm waters. Also, to emphasize that the characters are truly out in nature, a place that has the possibility to be amazing but also dangerous.
There are multiple animals seen. This tracking shot follows the heron. At different points, ducks and cows are also seen leisurely enjoying the pleasurable and beautiful setting.
Everyone is having fun. Marty has just helped George into the boat.
Wide shot of the setting to show how wide and calm the water is. The setting mirrors the characters' moods. At this point, music also begins to show the start of their journey down the river and their journey as characters.
River is calm and gentle edges (rocky beaches) to show the relaxed mood currently. George is rapping and some of the others even find this entertaining and are laughing along. Marty is the only one who seems bored and perhaps annoyed that the rest don't wish to seek revenge.