dude, i had the same problem, yesterday at school!!! i had a lot of dizzy after i smoked 2 joints with my friend!!!at the hospital they said to me, that i had air in the blood:O..
it was a shitty quality! that's y i think that i had that.. but y did that happened only to me? my friend was ok...and i was almost in coma:O < y did that happened? (and y that happened only to me?) pls answer smbdy!