After actor Tom Dallace delivers his lines in the "elevator sequence", a noticeably different voice is heard saying the line, "Hey, thanks a lot, man." The line was added in post production to fill in a moment of dead silence. Dallace was in Los Angeles shooting another movie and was unable to record the line himself, so an uncredited crew member dubbed the line instead.
A poster of this movie can be seen hanging on a door near the end of the "Ghostfacers" episode of the Supernatural series (S3E13).
In the "elevator sequence", Tommy Dallace is actually wearing his own drivers license on his medical lab coat instead of the standard hospital identification badge. Dallace was initially considered for the lead role in the movie, but was ultimately deemed to be "too good looking" for the part.