A couple of notes,
First off, I really l like how you compose your action lines, they're quick, efficient, and very descriptive. It's tight, keep at it.
Also, Brandon is quite unlikable, if I saw him on screen, I definitely would not be rooting for him.
Dialogue is Ok, sometimes it feels a little exposition heavy, as in you are telling stuff to the readers through dialogue and it fractures the credibility in the conversation. Maybe it's just me.
Ok, I continued reading and besides those exposition-heavy lines, the dialogue is very strong, i particularly love the exchange at the drive-thru.
The comedy itself works very well for this sort of short, it's very well realized and the whole poop fiasco was very enjoyable and it put a smile on my face.
Can I say that I was a little confused by the ending? Maybe I missed something.
Anyway, good job.