When Sheppard is prompted to "Exit Craft For Inspection", he replies "I'd prefer not to." This is Bartleby's signature quote, and also served as the tagline to the movie.
When Bartlesby (Angel Connell) says he would "prefer not to answer" posed to him by Tom (Mark Grant), part of the phrase is a direct quote from the original Bartleby (Crispin Glover).