it used to happen to me, like, at least once every other day a few months ago
now it's just like once a month or less
no but really that's some stuff you need worked out with a therapist.
what
please god
tell me you're joking
also, you can purposefully cause it by breathing really deeply while sitting down for a good ten minutes and then standing up and moving really quickly
I don't suggest doing that though, it could also cause you to pass out, and you could hit your head or something