the song was ok but check your facts
on one in the world has ever overdosed on thc from smoking marijuana. the amount you would have to smoke is so huge that your lungs would stop functioning because of the smoke not the thc. and what would kill you is the co2 build up not the marijuana. song was cool... but try to have a clue before you say things like that... ;) save yourself some credibility and keep from looking like a retarded tool.
(also btw the way the producers know the thc level is that every plant produces leaves with very close thc content to every other plant. the variations come from different strains and the producers know the differences. and 20% thc content is not possible to obtain form marijuana.)