Tangentially, I did this once years ago.

I had consumed a large amount of spicy food the day prior, and it pulled the fire alarm right in the middle of a phone screen. I foolishly thought I could silently and secretly handle both tasks at once.

These were the days before background noise filters. The poor candidate obviously heard unpleasant things but neither of us acknowledged it directly.

He accepted the job though. But this still bothers me decades later. Never again!