On the first day of filming, the production almost got shut down. Fire fighters were conducting very noisy drills just down the street. Luckily, the filmmakers had their permits in hand and the fire fighters were very understanding.
The coffee shop in the movie has been shut down, repainted and is now a yogurt store.
Bayhawk Ale sponsored Within by donating ten cases of ale, which were used throughout the film. The cast thanks them.
Marco Duran used a great deal of mirrors throughout the movie in order to suggest the duality inherent in the Peter character.
The party in the movie got way too out of hand. By the end of the night the director and stars knew less than 40% of the people present. The bathroom was completely and disgustingly trashed. Ironic.