The internet is freaking out over Donald Trump's odd demeanor during the second presidential debate

Observers on social media noticed Donald Trump's occasionally strange pacing on Sunday during the second presidential debate in St. Louis, Missouri.

During Sunday's debate, Twitter users observed that while Trump wasn't speaking, he often wandered around the stage, standing behind his chair and leaning on the back of it.

Even when candidates are not speaking during presidential debates, body language and stage presence is often heavily scrutinized and critiqued.

During a presidential debate in 1992, President George H.W. Bush was criticized for checking his watch repeatedly, giving the appearance of impatience to many viewers.

NOW WATCH: Golf legend Greg Norman reveals the truth behind President Bill Clinton's late-night 1997 injury