Crazy Gram

Me and my buddy ate 1 gram each, not expecting much, we then smoked a joint and i was beginning to feel the funny feeling and the general euphoria. So much happened and i cant really remember but i do remember staring at a light and being able to see each ray of light in amazing green and pink "lines" of light rays. They were moving around and It looked amazing. I remember feeling as though i could not hear anything but mumbles, then all of a sudden i got really tired and felt like i was going to have to go sleep. I went to the kitchen table and suddenly "blackness" took over me and I passed out for what felt like 10 seconds but im not sure how long it actually was and my friend who was next to me told me i just slouched down and started twitching, after this happened my friends were saying "Hes so fucked" He just had a seizure or something. I reassured them i would be okay and told them not to panic, I was extremely hot and sweaty and took off my sweater and and pants. I then felt somewhat normal again and for the next 2 hours i watched television waiting to come down and go to sleep. I dont know what happened when I blacked out and am wondering why this happened. Peace and remember dont panic, I was the calmest and my buddies were stupid and were freaking out, which didnt help much.