Continuity mistake: As Race, Jonny, and Hadji manoeuvre the sub through the tunnel, the scenes inside the sub show Hadji on Race's right side, but shots outside the sub showing inside the sub through the portal show Hadji on Race's left side.
Continuity mistake: Dr. Quest is wearing a headset and microphone from the views inside the diving bell. Looking from the outside into the diving bell shows Quest not wearing the mic and headphones.
