As jazz director at KCOU, I sometimes got to answer the office phone. Once, the general manager called, asking if someone was in, and I didn't recognize his voice. Unintentionally, I started speaking as if I were on the air, lowering the pitch of my voice and answering questions in the style I'd use for back announcing a Duke Ellington tune.
After a few sentences, the g.m. said, "Drew, it's me."
"Oh," I replied. "I guess I can start speaking in my normal voice, then."
At least I didn't fall into the radio-speak trap of saying, "(The person you asked about) isn't here this hour, but he'll be here next hour, and he'll be giving away a Pavement CD to the eighth caller..."