Applause-Worthy Timing

(A friend of my teacher sits in on a class due to his specialty in the topic.)

Teacher: “Oh, [Friend], have I introduced you to the TA yet? This is Ms. [TA].”

(As soon as he finishes saying her name, applause as if from a talk show appears from seemingly nowhere. The class laughs.)

Student: “Sorry, that was my phone going off.”

Teacher: *laughing* “That’s fine! It was perfect timing anyway!”