I tried googling how this happened and this page was the closest i could find on such a phenomenon. I have never since seen anything like it. My phone had to of been dead or i would of snapped one but i figured the next bowl from the batch would look the same but it didn't. Applying torch on and off twisting the pipe you will get burst off smoking and if. Tip apply torch heat on and off till you get a burst of smoke push air in and start sucking air in heating on and off and spinging the pipe side to side. The crackback should look more geometric in its pattern. We smoked it all before getting a picture. Yes but you need a torch and theres a heat applied on and off technique that will get you the biggest hit. You can determine if your meth is cut with MSM based on the crackback and taste of the vapor. I asked my friend if i was seeing things and she seriously saw them too and i have never experienced visual delusion before. Some smaller some bigger maybe a dozen or two but most definitely uniformed perfect spirals (the closest resembling thing i could google was by describing them as illusion spirals, where the spirals go from big and to small from the outside to the center) Also the meth looked wet even when completly hardened. One time out of the thousand bowls i smoked, the crackback of the meth had a bunch of spiral shapes in it.