If you’ve been to a big concert recently, you may have witnessed the mesmerizing skills of Sign Language interpreters.

Their skills are as enthralling as the performers on stage, and the latest viral video of one interpreter at an Eminem concert in particular is proof.

The original video, uploaded to Facebook by Kate Fillingame, shows famed interpreter Holly Maniatty to the side of the stage, signing along to “Rap God” with Eminem as he performs at the Firefly Music Festival:

To give you an idea of how good Holly’s signing is, we lined it up with the performance itself:

Maniatty has become a star in her own right after numerous appearances alongside rappers like Snoop Dogg, Jay-Z, Wu Tang Clan, Beastie Boys, and more over the years — in addition to previous Eminem concerts.  She’s also the same interpreter that garnered internet attention after this video of her with Waka Flocka showed the rapper confusing her signing for dancing: