in my experience anyway, this is probably a result of some sort of thing happening or having-happened in your life. if you want to get your psychological state under control, its a probably pretty prudent plan to try and figure out what is effecting you, and causing this, that it may be addressed if possible.
seperatley, as far as controlling and inducing this sort of thing, I feel like I had some success meditating into a state like that (forgive me, my vocabulary to describe this sort of thing seems rather sparse), some years ago. Not with quite the immediate zoomy-out feeling you seem to describe, but the third person dettached-ness and feeling of being an observer to self, most certainly. I also participated in some therapy which, in reflection I am not sure was supposed to follow a detached perspective, but used hypnotherapy to do sort of guided visualization meditation. it might be useful for keeping that sort of thing in your head, rather than manifesting suddenly when you're doing something in the world, but then I don't know your situation.
that said, I am not sure if really I controlled those, and furthermore am not really sure if any like, benefit or interest came of it. frankly it usually makes me feel a bit sick, and even if the actual experience fades it leaves a lingering sense of, I am not really sure. feeling like the world could all fall apart at any minute and I am not sure I'd care. >>496>autopilot
perhaps this is one of the few situations where it'd be truly useful, but honestly probably the ideal path would be to try and prevent those situations from happening entirely. I sorta think some of us get this disassociation as a result of being in those places where its useful a little too often. but I suppose its easier said than done, to get out,
>You are probably flooding your system with too many endorphins from constant stimulation
this sounds rather totally not like the times when I've had increases of disassociation events, I suppose I dont really know how the whole like, biochemical side of things work, but this description evokes a totally different image than whenever I've had feelings analogous to OP.