After he asked her she actually said yes and he planned on taking a canoe trip there fishing along the way
On the way there he tossed a line in to see if anything bites and he kinda forgot about the fact sheila don't like fishing and he got something on his line that he thinks is the biggest bass of his life he doesn't know if he should reel it in or cut the line.
After all he takes out his knife and cuts the line. They arrive at the concert have a few dances and sheila leaves with another guy leaving the boy to paddle home alone thinking about his decision
After all the boy regrets his decision about cutting the line because sheila didnt like him in the first place.