Bart and Lisa see a commercial for Mount Splashmore on TV and they're instantly hooked. They bug Homer deep into the night but to no avail. The next morning Homer is exhausted from the kids keeping him up all night. He drives to work, along the way he falls asleep and runs into a tree. Marge receives the news that Homer is dead and the family holds a funeral for him. Bart and Lisa feel responsible for Homer's death.