Hillary Clinton’s strange head movements were the topic of conversation as the final presidential debate was underway Wednesday night.

As the two candidates sparred on stage at the University of Nevada, Las Vegas for 90 minutes, the Democratic nominee rocked her head back and forth as Donald Trump answered questions from the moderator Chris Wallace.

Viewers at home quickly noticed Clinton’s strange behavior. (RELATED: People Can’t Stop Talking About Donald Trump’s Health On Twitter During The Debate)

Hillary Clinton is indeed smiling less…nodding a lot and looking visibly angry — NewYorkElephant (@NewYorkElephant) October 20, 2016

Senator @HillaryClinton is nodding at Trump calling her plan a disaster. She must agree.#MakeAmericaGreatAgain#HillaryClinton — Deplorable Wes Smith (@UniverseBlade) October 20, 2016

Why is @HillaryClinton nodding at every point @realDonaldTrump makes? Seems like she is agreeing with him at every turn. #debatenight — Coach Miller (@JaredLMiller) October 20, 2016

@HillaryClinton why are you nodding when you are called a liar?!? Cause you are!!! #NeverHillary — Logan (@greenerbehrend) October 20, 2016

Hey @FoxNews why @HillaryClinton nodding her head like she listening to someone in her ear?? — Samantha Evans (@sEvans082314) October 20, 2016

Is this @HillaryClinton or a bobble head stand in? Her constant head nodding is making me nauseous. #debatenight — Cherie.Alice (@tpagrl803) October 20, 2016

Why THE FUCK is @HillaryClinton nodding?!? — Andrew Wong (@applehazelnut) October 20, 2016

@HillaryClinton Head nodding again,,,,this is why she keeps head down to podium. pic.twitter.com/K9cwDCOmsK — WiseOwl (@Wise_Owl24) October 20, 2016

@HillaryClinton who are you looking at to your left…and you keep shaking your head in agreement. Who are you agreeing with???? — vvictor13 (@vkvictorjones) October 20, 2016

Hillary Clinton silently shaking her head needs to be a GIF stat — Corey J Belford (@thecoreyhotline) October 20, 2016

Hillary Clinton is a bobble head!!

#debatenight — Captain Deplorable (@Stevenverrier77) October 20, 2016

Hillary Clinton looks like a fucking bobble head #MakeAmericaGreatAgain #debatenight — Christine D (@chriiissssyyyyy) October 20, 2016