"I've never seen that before," he says to her before challenging her to sign a profane phrase, which she does wholeheartedly as the crowd hoots and hollers.
At a Wu-Tang performance, Method Man took notice of her signing, came down from the stage and joined her.
"He said, 'That's dope,' and gave me a hug and a fist pump," she said.
Oscar-winning actress Marlee Matlin, who's deaf, took to Twitter this year when she saw a video of Maniatty performing at the Wu-Tang show: "Wu tang interpreter is rapping in sign BIG time!!"
The 33-year-old Maniatty learned sign language while studying it at the Rochester Institute of Technology in New York. She decided to make a living of it despite counselors' advice against it.
She works for a company that connects deaf people with other people over videophones that are connected online. But from mid-April to mid-September, she travels for paid gigs interpreting all types of music hip-hop, rock, jazz, country, gospel, rap.
It's hard work. To prepare for concerts and festivals, Maniatty studies the musicians for whom she'll be signing. She learns their lyrics, their dialect, their every move.
Jay-Z, for instance, is open and boisterous on stage, while Eminem slouches and drops one of his shoulders.
"As much as you're able to study those movements and incorporate them into your interpretation," she said, "you really breathe that artist in, and it's more authentic for people."
- AP