I think I got it

I've written two new conflicts, the boys going to a closed gas station and getting attacked by a homeless man and then running out of gas and the protagonist having to poop in the wilderness and runs into a poop cult. I think the homeless man bit can be really funny and is separated from the rest of the poop idea, giving the viewers a breath of fresh air. With the cult, this would be the climax of the piece and where the protagonist finally poops, and while it's ridiculous, I think it could work pretty well since its a comedy and the situation is just getting more more crazy/intense. I'm just don't think a simple or anticlimactic ending like him just finding a bathroom would fit the ridiculousness of the rest of the piece. I feel like it would soil the rest of the short. 

For the homeless man, I wrote it so that once the boys find out that the gas station is closed, they reluctantly go behind the store to poop in the back, but then a homeless man jumps out at them and starts hysterically screaming at them and attacks them, causing them to run away. For the homeless man, I know that it can't realistically be a teenager playing the role, just because....like no. Sooo time to use my younger sibling privileges to my advantage and use my older brother. Luckily for me, he's been taking acting classes. I also think he can play a meannn homeless man. I mean just look at him.

I think he’s homeless passing. Just scruff him up a bit, get the costume right.

For the cult, filming gets way more complicated. I need to film outside. In a forest. At night. 

(i know i’ve used this before, but i just love this gif so much)

BUT, I sorta alleviate this by only having the protagonist go out and one or two other cult people. For lighting, I'll imitate moonlight with a cob light, which is just a big fat light that is super powerful. Like a straight beam of light. The cult members also have a campfire going, so that will provide a large amount of the light. I’m finally doing this, filming. I’m a little nervous but mostly excited.