DETROIT (AP) Donald Trump paced his rally stage in silence for nearly 20 minutes Friday night in Detroit after his microphone cut out.

The Republican nominee and former president was about to wax on about one of his favorite subjects, tariffs, working up to naming it by first teasing the most beautiful word in the dictionary. Very quickly afterward, the sound went down.

The crowd chanted USA and We love Trump in support. But with no microphone, Trump simply wandered around the stage. Looking frustrated, his back was turned to most of his audience at times.

It was the second time in a week that one of his events was interrupted though the last time, on Monday, Trump cut off a town hall and instead played music after multiple people in the audience needed medical attention. This time, Trump appeared to have little control over the matter, standing silently while the screens in the room displayed the messages Technical Difficulties and Complicated Business.