Gavin Hood’s sci-fi adventure Ender’s Game comes to Blu-ray February 11th, and we have an exclusive behind-the-scenes look to share with you today. This Blu-ray featurette takes a look at stars Asa Butterfield and Hailee Steinfeld going through zero-gravity training and shooting scenes for the Battle Room. In addition to the actors’ commentary, director Hood and stunt coordinator Garrett Warren talk about the process of shooting realistic zero-gravity scenes, training the actors to simulate motion in zero gravity, and even inventing unique rigs to move the actors around on set. It’s a cool look behind the scenes of Ender’s Game’s movie magic. Hit the jump to watch, and for how you can win a copy of Ender’s Game on Blu-ray.