Hillary Clinton Momentarily Missing From Debate Stage

"Sorry!" Clinton said after she returned to the stage.

"We want to turn to American jobs, wages, and raises in this country. And do we believe Secretary Clinton will be coming around the corner any minute," ABC News' David Muir said.

Seconds later, Clinton returned to the stage with applause -- and one word:

"Sorry!" she said.

While it's unclear what caused the delay, plenty of people on Twitter had some fun with the moment.