seizure-like episode from smoking

so i haven't been back to the city in a long time,
but recently i've started smoking every day again, so i thought i'd drop by,
and while i'm here ask some questions.
so about a month or two ago i smoked some more than decent but not dankitty-dank shit.
i had smoked it about three or four times before, and been fine.
well that night when i smoked it,
i took what very well might be the biggest hit i have ever taken in my life,
and got super stoned out of my mind.
i was with my then-boyfriend.
we drove around for a bit, just chilling, then went back to my place.
well almost as soon as we got in my house, i just got completely lost in the high.
it was almost like a trip, i was completely gone.
i couldn't remember anything from one second to the next,
and everything was far away and my vision was shaking and jumping all over the place,
and basically i just like tripped out.
it's really hard to describe, especially since i cant remember it too well.
well, i ended up coming back to awareness on my floor,
with my brother and my boyfriend looking down at me.
they kept asking me if i was okay, and my brother kept saying that he had been about to call 911.
apparently i had fallen over and started thrashing around on the floor.
for the rest of the night i had to be careful not to let myself slip back into it.
i've smoked a lot since then, and it hasn't happened again.
i have no idea what it was.
has anyone else ever heard of something like this happening?
it kind of freaked me out to be honest.
i was afraid to smoke again for a bit.

 

not really.
like... i'm sorry it's kind of really hard to explain.
i've never been high like it before or since, and it's not an experience i care to repeat.
i've blacked out too before, and again, it was nothing like this.
i had tunnel vision, and the colors were really intense,
and it was like the image would bounce and shake,
and then i could feel my body twitch in response.
except i wasn't really aware that i was twitching.

 

haha sorry if you don't like the writing style man.
i start a new line where there would be a pause in the sentence if it were spoken aloud,
kind of like a poem, yes?
i find it makes it easier to convey tone of voice through text.
but, different strokes

maybe i did just get too high, kind of scary shit though.
having considered that possibility, i've tried not too get too blazed out of my mind since then,
and just focused on getting comfortably stoned.