AceShowbiz -

Jennifer Garner on laughing gas is the funniest thing you could see of the actress so far. The "Dallas Buyers Club" star, who recently joined Instagram, took to the photo-sharing site to post a throwback video of her crying over "Hamilton" after dental anesthesia.

In the video, Jennifer burst into tears as she told someone over the phone about the "Hamilton" score that made her cry. "They did the sad part of Hamilton and I started crying, I couldn't stop," she explained in the hilarious clip. "They said, 'Are you OK?' And I said, 'It's so beautiful.' It was so beautiful, that music. It was so pretty. And so I told them about it, they have to see it."

The mother-of-three was overly emotional because of the effect of laughing gas. "Throwback Thursday -- that time I had dental anesthesia... laughing gas + novocaine + Hamilton = you're welcome," she captioned the video.

Throwback Thursday-- that time I had dental anesthesia...laughing gas + novocaine + Hamilton = you're welcome. #TBT @hamiltonmusical

Sebuah kiriman dibagikan oleh Jennifer Garner (@jennifer.garner) pada Sep 14, 2017 pada 10:45 PDT

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Jennifer Garner joined Instagram on September 1 and as her first post she shared a video of her urging fans to make donations to help Houston community ravaged by Hurricane Harvey. She later also shared pictures of her traveling to the Gulf Coast to help hand out donations to families who have young children at Hilliard Elementary in Houston.

"Today I was inspired by the huge hearts in Texas. There is a generosity of spirit that gets lost in political rhetoric, but-- people come together in a time of crisis. You know what's beautiful? Children look for light," she wrote on her post.

"Terrifying things have happened to these kids in the past couple of weeks, but they don't want to dwell on those stories. They want to tell you that their neighbor's puppy was found. That they saved their mother's life by throwing her a rope when the flood water overcame her and now she's ok. That they all celebrated when power came back on. We have to protect our kids and we have to learn from them," she continued.