I have noticed some re-occurring occurrences while undergoing a trip. The first he has heard referred to as 'acid shivers'. It is similar to a 'cold shiver' going up and down your spine only about twice as long. The sensation seems to go up and down and up and down, making the shoulders go back and fourth nottwice but more like four times. The other occurrence is more like a side-effect. It involves speech. Finding the right word can take much longer, as in remembering the name of a specific color. At some dose (I'm guessing 300-400 mics) speech becomes near impossible. At normal doses SWIM's sentencestructure seems to be affected. He doesn't know how many times he has been left hanging when he finds himself mid sentence and realizes there is no way to finish the sentence. It's like merging two sentences and not even producing a full one. This one time he was talking to a cute girl at a party and he kept getting his foot stuck in his mouth. She asked him if he was having 'trouth mubbles' (mouth troubles). Nostradamus thought that was very funny.