wanted to put down somewhere but "wah u uav tu much lettur karakter" harsh hits. Primary<i guess) O Oxidation : Listen to pronunciation. (OK-sih-DAY-shun) A chemical reaction that takes place when a substance comes into contact with oxygen or another oxidizing substance. Examples of oxidation are rust and the brown color on a cut apple. in this case the fiya it does.. rapid combustion. the flame burning the weed may burn bright yellow. intensity varies. resin may go with th intense heat. too high heat may convert thc to cbn, causes somewhat lesser psychoactove effects/sedation. also varies,as people vary. mucus and acid reflux may increase brown spit or harsh ,go test it. vacuum effect usually happen with it which it would said oxidation. vacuum may create when there is different air pressure within body than outside or not giving smoke enough space to reach lung. it may make swirlys also Primary<is) breathing wrongn tension/stress. tense breathing. cantrap the smoke in throat or else where (not in the boof) similarily to how frog breathes. example is chest breathing during panic. can make it very harsh. to fix.. take a break, fucking sterilize all areas of glass youre cleaning n air dry, dont smoke if already hacking n shit, dont smoke when too anxious if tense, see if distilled water helps, stop smoking cigarettes or hardly do, and if you cant take a full comfortble breath of air why would you out a bong or bowl of smoke?? works for me n 2 my smokin buddys so hope some other person too good luck hoagies ✌️and Screw that 1 guy lol