I have tripped on methylone 4 times. Every time he trips on it he finds that the methylone induced a pattern of slow deep breathing. SWIM assumes the drug must be causing large amounts of oxygen to be used in metabolizing of sugars and fats and the body is responding by increasing oxygen intake. I do not experince this effect with any other stimulent drugs. Has anyone else found this to be the case with them with either methylone or any of the chemicals in the MDMA class of drugs?