When the collision occurs, the passengers in the Cafe Parisian are thrown off balance. When the actual collision occurred, the upper decks only experienced a slight bump. The brunt of the collision occurred in the crew sections in the lower bow.
The TITANIC model in the film hits the iceberg on the port (left) side. Historically, the impact occurred on the starboard (right) side.
Captain Smith was not on the bridge at the time of the collision. He had gone to sleep and command was handed over the First Officer William Murdoch.
The TITANIC's boilers did not explode.
The top of a crewman's head can is poking out from behind the TITANIC model during the sinking scenes. You can see it between the aftermast and funnel number four.