thats tough, that happened to me once, i just picked up and then i hit the gravity bong, i started freaking out after trying to fall asleep.
i got all paranoid..
later i realized it was sativa strand.
there was other time i smoked it in a cannabis cafe called HotBox in downtown toronto, and i freaked out and took the next bus home right away. i sobered up and realized how stupid i was.
it could be sativa strand.. it tends to make me freak out alot.