Director Gabe Torres wanted to do a Die Hard-style thriller that took place in a single location. He contacted his agent and she started looking at scripts. She called him and asked him if he wanted to consider a movie that took place in the trunk of a car. He asked "how much?". She responded "all of it".
The phone numbers that are used in this movie are not the traditional 555 numbers used by Hollywood. Actually, the number that Henry gives as his home number is for the Norfolk Baseball Academy in Virginia.
When Jeremy reaches through the tube to the interior of the car, he pulls back his hand with two knuckles scraped raw and a cigarette lighter burn on his hand. The knuckle wounds remain but the cigarette lighter burn disappears within seconds.