By Noelene Clark
July 12, 2015 at 12:00 PM EDT

The cast of X-Men: Apocalypse are five weeks into filming the massive superhero film, but Olivia Munn still can’t quite believe she’s a part of it.

Joined in the Entertainment Weekly Lounge at Comic-Con by co-stars Michael Fassbender and Oscar Isaac, the “Attack of the Show” alumnus talked about playing Psylocke, and what it’s like to finally don a superhero suit.

“It’s one of the coolest things,” Munn said. “It really doesn’t feel really. It’s a very cliche thing to say, but it’s just a really surreal thing when you’re on set. … I try not to mess up anything or touch anything, don’t break anything because they’re going to ask you to leave. It’s this feeling of very surreal and temporary in a way, if that makes sense. Like a dream.”

The actors also shared some details about the film and engaged in some friendly ribbing before breaking out into song. Check out the full interview in the video above.

The film, helmed by returning X-Men: Days of Future Past director Bryan Singer, is due in theaters next May.

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