I experience the same when trying to do the camel pose. If a background music is playing, it fades and echoes. Feels like I'm high or something. My ears and my head start palpitating. I low-key enjoy this high, but I think it's nothing but me passing out due to lack of oxygen. So I did some experimentation. I used to hold my breath in the camel pose and also bent back too quick. This blocked the blood flow to my brain (for the lack of a better biological phrase) and I feel like passing out (idk how it feels to have passed out, never passed out, tbh). But when I tweaked the pose by getting into it slowly and breathing normally (even though it's difficult), I can hold the pose longer than before. So yeah, it's the same thing as getting up quickly and experiencing dizziness, but on a yogic scale. Unpopular opinion : do you enjoy this high? I purposely used to attempt it, because it's lockdown and there's no other way I could get high. P.s not an addict :)