The sequence ends in a blackout. When images return, we don't know how much time has passed. A tracking shot follows a trail of debris. Lane crawls out of the wreckage. She walks away, leaving the unconscious Christina behind.
Future is severed from past, effect is separated from cause.
The story swerves onto a new track. When we see Christina again, she is no longer herself. She is grotesque. Her face is disfigured. Her brain is damaged.