I do not have the official answer for this, but a conclusion I drew myself is that it’s not real. There was a beloved sword swallower at my local Renn Fest (Johnny Fox, who died a few years back. Massive loss) and the real deal looks totally different. Essentially, he would get it into position and partially down, and then it was this wild swallowing action where it was fully inside in about a second. It was crazy.
Hunter: Your teeth need whitening./ Heidi: You sound weird./ Jeff: You taste funny.
-Jeff Bowen's worst onstage line flub.