In the video, aimed at demonstrating the infamous tilt, the marble was rolled on a hardwood floor but it then changed directions.
"Rolls about 10 feet out," Jernigan, who shot the video, said of the marble's trajectory. "Slows to a stop and then turns around and starts rolling back and picks up speed as it goes past him."
"In the direction that the building is leaning," Faulk interjected. "And so, it was like, 'Oh my God.'"
In 2017, CBS's "60 Minutes" called a segment on the Millennium "The Leaning Tower of San Francisco," and showed alarming stress gauges and cracks in the building's foundation.
Jernigan and Faulk sold their two Millennium units in 2017 for what the former software engineer called "earthquake sale prices."
"It was a really wonderful place to live and, of course, we didn't know it when we were moving in, but there were also wonderful people that lived there," Jernigan said.
Amenities in the building included a barrel shaped wine locker, a private movie theater, and a sprawling outdoor terrace with a marble fireplace and waterfall overlooking the indoor Olympic-sized pool.
Jernigan and Faulk, of course, will not be around with their friends and onetime neighbors for the completion of the Millennium's fix in late 2022. They have moved to another condo complex.
"We did what we had to do to get peace of mind," Jernigan said.
Faulk added, "We got our suitcases ... put everything in .... and we left."