There’s a moment in Gravity when you suddenly realize you’re not safe. Sandra Bullock’s Dr. Ryan Stone is installing a component for the Hubble space telescope, wrapped in her bulky spacesuit. Mission Commander Kowalski (George Clooney) loops around her, showboating while he makes small talk with Mission Control. The camera circles in one of director Alfonso Cuarón’s signature long takes, framing up Bullock with just the blue orb of planet Earth behind her. The 3D pulls you in, and then it hits you. One wrong move could pitch you right out of your theater seat, sending you hurtling through the IMAX screen and toward the planet far, far below.

And that’s just three minutes in.