The name crack derives from your crackling audio that is created in the event the drug is heated after which you can smoked, based on the Heart for Material Abuse Investigate.P?ruv??n C????n? is ?n? ?f th? ?ur??t file?rm? of C????n? that ?? f?und ?n th? ?l?n?t. It can be u??d b? ????l? ?? ?t?mul?nt t? ?n?r???? th? ?r?du?t??n ?file ?????file?? subst