"Throwback Thursday -- that time I had dental anesthesia...laughing gas + novocaine + Hamilton = you're welcome. #TBT @hamiltonmusical," she captioned the video of her speaking to someone on the phone while in the passenger seat of a vehicle.
"They did the sad part of Hamilton and I started crying. I couldn't stop," Garner exclaims to the person on the phone. "They said, 'Are you OK?' I said, 'It's so beautiful.'"