Based on the context and my own personal experience as a person who has interviewed hundreds as a hiring manager --not syaing I do this, just that I understand-- they said “HEY FRANK WE NEED YOU TO SIT IN THIS INTERVIEW IN 30 MINUTES. K THANKS” and Frank showed up and tried to pretend that he knew what was going on.
Also these first impression moments are good because you can predict how they would treat you if you worked there. I walked away super annoyed and didn’t care that I didn’t get called back in. I was way overqualified for the position but was also desperate for one since I had just moved back to the country and needed to sponsor my spouse for residency.