This was in 1978 or 79 and I had been to the party corner. This was a corner of the parking lot at the high school I attended where people hung out to do drugs etc. After smoking some weed I went to Algebra class. It was when I sat down I realized something wasn't right. I was feeling thousands of pinpricks and pinches all over my body and the only thing I could do is lay my head on my desk and bear it. Finally, by the end of class it went away! During this time the US government was spraying Paraquat in Mexico and I am pretty sure that's what it was! It only happened one time and the spraying was short lived, thankfully!