Ive noticed that on any pill that gives an mdxa reaction my friends and myself find the pills give 1 of 2 side effects while beaming.When we have consumed one thats formally known as the term "Smacky"(hqs bbs mtvs ect ect) we tend to yawn a lot.However on the so called "clean" ones (green/orange ? blue orange As ect ect) we tend to stretch alot...and this happenes all night.Just wondering if anyone... and im sure there are (obviously if friends feel the same there must be somthing to it)what do you put this down to?