The Death: Grandpa Edwin dies of a heroin overdose in a motel halfway through the trip. To avoid missing the pageant due to bureaucratic red tape, the family smuggles his body out of the hospital window and carries it in the trunk of the bus.
The Twist: Dwayne is colorblind. He realizes this while reading a pamphlet in the van, leading to a massive breakdown where he breaks his vow of silence, screaming "I hate you!" at his family.
The Ending: Olive's talent routine is a striptease-inspired dance to Rick James' "Super Freak," taught to her by her hedonistic grandfather. The organizers try to pull her off stage. In a moment of solidarity, Richard, then the rest of the family, jump on stage and dance with her. They are banned from the pageant for life but drive away happy and united.