As a kid, I used to tape a pot pipe to p/u truck dash console, run tube up my un-tucked shirt, down & out my long-sleeve arm-hole, into bottom of empty (but painted to look half full) McDonalds pop cup then up the straw. A traffic light sitting next to cop car I'd tap my cig ash out window, sip a DEEP toke of 'coke' and when I needed to exhale I'd puff ciggy 'n blow smoke. I LOVE fucking with authority...Thanks (Authoritarian) Mom&Dad !