good bit of mechanical special effects under the pervue of Chris Colbould, Special Effects Supervisor and Miniature Effects Supervisor, that needed CGI to deliver the final product. For example, there is a scene with a train crash where a full set was actually built. Two full size train carriages were built for the scene. They weighed several tons. Ten remote controlled cameras were used to record the scene and no one was allowed on the set for safety reasons because those train cars were literally crashing through the set. It is a miracle of CGI that Bond survives the episode. Ok, I gave away a little but you know Bond makes it to the end of the film. Or do you? The filming required extensive choreography and meticulous takes for safety and creative reasons. The end result are fast paced scenes that took weeks to do even with a little CGI assistance. Scenes tend to be filmed in short snippets based on storyboards. Sony also provided some other fun facts about the film because things were a little different in preparation and on set. Sam Mendes actually had the actors do a full read through in preparation. Sam has done a good number of stage productions and brings that expertise to the the screen. The cast actually received live weapons training before filming. They burned through 200,000 rounds of ammunition. Patrice, one of the characters, actually uses a GLOCK 18 that holds 100 rounds and can spit them all out