Any vocal coaches out there? Can you explain what Dominique Persi is doing here?

I know she’s doing clean singing and probably Fry screaming, but what is this odd oscillation that she does, and how does she transition between like 4 or 5 different techniques in the same verse? Insane.

Wow, this is maybe the first time ever that I’ve had blank stares from the Doper Legions!

Pretty amazing for sure. I think the “odd oscillation” is akin to yodeling, except with a shorter distance between pitches and doing it a lot more rapidly.