it's just your tolerance.....every drug (illegal and prescription alike) affects every user a diffrent way....their body has a diffrent reaction to it which causes them to act diffrent and sometimes get a diffrent high....while they just may be blown out of their mind and want to sit on the couch until they die you want to get up run around because you have lots of energy....just practice on chilling...my littler brother used to act really stupid on weed.....then me and my other brother just started cutting him off (not letting him smoke) until he would act normal.....1st offense was that he didn't get even one more hit until he was sober and me and my other brother wanted to smoke again...2nd was no more that night....lol we were such asses to him