The cast and crew were mostly sophomores at Temple University when Downhill was made.
Downhill was shot in 11 days and had 2 days of re-shoots.
Melissa Phan happened to be enrolled in a rock climbing class with Joe Gariffo which ultimately led to her being cast as Rachel.
Tyrone's line to Jonah: "You're nothing compared to people like me. You are dog shit!" was originally scripted as: "You're nothing compared to people like me. You are scrapple!" The line was inexplicably changed at the last minute. Jonah's response was thus changed from: "Scrapple tastes good!" to "Dog shit tastes good!"
The entire cast performed their own stunts.
Shane Bissett: Writer/Director in the infamous 'basement' scene where Tim and his friends plot to kill Jonah.