During the fight between Sun Bak and Detective Mun, the bloodstains on Muns shirt appear before he gets punched in the face, and in subsequent shots the stains disappear and reappear in various forms.
At 28 Minutes, when Nomi wakes Sun, and walks pas the mirror, her reflection is visible, although she is physically not there but merely a projection of Sun's mind.
At about 0:55:00, when the woman says Dr. Al-Saadawi's name, you can see her mouth is saying something different.