During the opening scene in the bowling alley, Marla's date Allan Hunt rolls his ball down the lane with a left-handed delivery. Cut to the next shot, the ball strikes the pins with a hook from the right, as if delivered by a right-handed bowler.
Dr. Max Taylor (Milton Selzer) says that "only a third of an iceberg" is above the water. In reality, less than 10% of an iceberg is visible above the waterline. A medical doctor ought to know this physical property of ice.