Politely end the interview immediately. Really. I had an in person interview with multiple people at a company and the CTO came in for his part and immediately

Politely end the interview immediately. Really. I had an in person interview with multiple people at a company and the CTO came in for his part and immediately started telling me how he wasn't supposed to be there he was supposed to be on vacation and he had a flight to catch so let's get this over with. I immediately said "Thanks for your time, please let everyone else know I appreciate talking with them and enjoyed our conversations. I'm not comfortable working at a place that treats candidates this way." and I stood up and left.