Trevor trying to sneak away from his GMa after crapping on the floor.
oh no! grandma might notice i was pooping on the floor!
what's that horrible smell?
Trevor finally sneaking away from his GMa
i'm gonna sneak out of the kitchen so grandma doesnt notice
I hear demons! WHO'S HOME!
His parents and neighbors destroying the crap he left and asking God to take the demons away.
Lord get the demons away from us and our homes
His GMa cant see very well so she doesn't see Trevor, but she smells and hears what hes doing so she is startled. Trevor crapped in the house because it was raining outside and he was really scared of the flies that stay inside the bathroom especially since it was raining.
Trevor saw that his grandma kept asking who was there, he was really scared that he was gonna get caught, so he created a pattern for him crapping, he would wait a little before he would continue every time to reduce the noise. once he finally finished he went to his and "fell asleep" until his mom showed up and smelled the stench herself.
Trevor's mother found the crap at the bottom of the trash and thought it was a curse put into the household by a demon, so she grabbed it, gathered the neighborhood to go and burn it with her because that what they thought would break the curse, so they incinerated the crap and prayed together.