Warner Bros. has released a new behind-the-scenes featurette for The Suicide Squad in which director James Gunn and members of the cast hype the superhero film and tease more of what to expect from it.

In particular, writer-director James Gunn said The Suicide Squad is the biggest movie he's ever made and that one of his goals was to film most of it using practical effects--and he achieved this. In the video, you can get a glimpse at the great lengths the crew went to film with practical effects and in real locations like Panama as opposed to relying too heavily on CG. In one sequence, we see a water scene with camera operators submerged. "You're hearing the explosions, you're smelling the gunpowder, and that ups the ante," Harley actress Margot Robbie says in the video.

Of course, the movie does use a number of visual effects shots, and Sylvester Stallone's entire King Shark character is completely CG.