Sen. Amy Klobuchar raised eyebrows during Wednesday’s Democratic primary debate when she appeared to shake as she answered questions.

Some viewers were concerned for the 59-year-old Minnesota lawmaker and others were just plain distracted by her apparent vibrating.

“klobuchar has been very visible shaking all night is she f–in okay,” tweeted @LukisYT.

“Why is Amy so shaky? Is she just really nervous?” asked @davejay.

Added another Twitter user: “Klobuchar is literally shaking. I’m worried about her health.”

One user said the lawmaker was “like a human vibrator.”

Some attributed the trembling to Klobuchar’s hairdo.

“I like Amy Klobuchar, but why does her hair shiver when she is talking? Is she nervous? Its visually distracting,” tweeted @ethansemmel.

Another person quipped: “Klobuchar’s hair helmet is shaking like there’s an earthquake, and we need to get to the bottom of this.”

Early in the evening, Klobuchar made waves with her statements knocking down the notion that a woman couldn’t beat President Trump in an election.

“Women are held to a higher standard,” Klobuchar said. “Otherwise, we could play a game called name your favorite woman president, which we can’t do because it has all been men.”