A little side-note: Many people who try active dynamic meditation for the first time, i.e. deep, fast, chaotic breathing through your nose, feel an urge to vomi

A little side-note: Many people who try active dynamic meditation for the first time, i.e. deep, fast, chaotic breathing through your nose, feel an urge to vomit after just a few minutes. I've had it on a number of occasions. I know it's different from a runners urge to vomit, but ones mind/CNS certainly play a lot of tricks as well.