Trivia: This is Colin Farrell's second role in a movie adopted from a story by Philip K Dick; his first performance was in 2002's Minority Report.
Trivia: Douglas Quaid's line of "who the hell am I" and Lori's reply are the exact same lines from the original Total Recall.
Trivia: When Quaid gets to great Britain with the fake passport and fake face, before him is a fat lady in green who strongly resembles the "costume" used by Arnold Schwarzenegger in the original film.
Answer: The absence of the tattoo on Quaid's arm hints that the whole scenario could have been a memory, brought on by Rekall.
THGhost