Dizziness or tingling during breathwork is normal, but passing out should be avoided.

“I think if you are holding [snorts] your breath to the place you're passing out, maybe you know take that back a notch. Yeah. Right. >> But um if you get a little uncomfortable, that's cool. And if you get a little luminous, just take a second like you know I think that's the the word that the yogis would do is luminous. Right. Your face is tingling. You're like what's going on? But really, you're just changing probably what's happening with pH or you know, some aspect of that breathing system is being modulated and you're feeling a little tingly. Totally okay.”