Very rarely does the most pivotal moment in a film happen in an elevator—but in writer/director Mike Cahill's I Origins one simple mistake while traveling between floors changes everything.

We won't spoil what happens to molecular biologist Ian Gray (Michael Pitt) and his girlfriend Sofi (Astrid Bergès-Frisbey), but we will say it feels so earth-shattering for a reason you may not expect: The sound design was constructed to make the audience feel trapped. It was specifically mixed for Dolby's new Atmos theater speaker systems so anyone seeing the film in a Dolby Atmos theater is left feeling claustrophobic and may not even know why.

"All of the sudden you feel like the entire theater is an elevator, and you feel it wobbling," Cahill says in this exclusive clip explaining how they pulled it off.

I Origins got the special sound treatment as the inaugural recipient of the Dolby Family Sound Fellowship. Under the fellowship, the movie was mixed at Skywalker Sound by Academy Award-nominated sound designer Steve Boeddeker, who strove to make many scenes, including that crucial elevator moment, envelop audiences in a new way. (A fairly interesting twist in a movie all about the biological and spiritual importance of eyes.)

Find out more about Boeddeker's sound design tricks in the clip above. I Origins opens in New York and Los Angeles on July 18 and in other cities later this summer.