Sounds like you had a panic attack. A friend of mine had a severe panic attack a few years ago, after a night of heavy bucket (pressure bong) smoking. Soon after he had his last bucket he started screaming then could not keep control of himself, he was shaking and falling around and talking about hearing his heart beating too fast, etc. After awhile he got to sleep. He said he has simliar but far less intense attacks prior to that nite. This prompted him to go to the hospital, where they said he was fine and he just siffered a panic attack. To this day he will not touch a joint and that was about 4 years ago.