In Now You See Me 2, the Four Horsemen attempt to steal a computer chip from a top-secret facility. Though they each have their own specialty magic tricks, the power of hypnosis becomes their most valuable tool. But is it really as easy as it looks? I sat down with the mentalist who worked on the movie to find out.

Irish magician Keith Barry worked on Now You See Me 2 as the Chief Magic and Mentalism Consultant. For the sequel, which stars Jesse Eisenberg, Dave Franco, Woody HarrelsonLizzy Caplan, and Daniel Radcliffe, Barry taught Harrelson and Franco the secrets behind hypnotism.

Barry told me how he uses the skill in his daily life, the reason he once hypnotized his wife, and taught me a magic trick to determine how “hypnotizable” you are. Check out the interview above.

Now You See Me 2 opens June 10.