Weird Interview!!!?

I was turned down for a job this past week and was invited to call for an evaluation of my interview. I decided to call to polish my skills. I was told that I was confident and excellent at show-casing my skills. My eye contact was excellent as well. However, I sat too far back on the chair and was too relaxed. He said I reminded him of his "lazy teenage daughter lounging around texting all day". I burst out laughing and asked him if he only hired tense people. He got nasty and said relaxed people are bad, lazy employees. Is that what potential employers really think? I've got another interview coming up and want to
improve my chances. Advice, please.