If the "sand" is being set on fire, won't it melt? It'll just turn into mucus then, which can be coughed up easily.
This weed has been sptrayed with soem sort of silica spray used in model making and may be extremely dangerous when smoked - not just due to the glue but if the small gritty glassy particles are inhaled it may lead to bleeding lungs.
remember.... we are SMOKING it, not sucking it up thru a straw... some of you seem to forget... roaches, water, gauzes... they all stop us 'inhaling' crap, and as for the bleeding lungs... ive never heard such verbal cow manure in my life... if it doesnt cut our fingers... what makes you think it will cut our lungs???

i think its all bullshit... and i have had that weed... and fucking right i took it back... just look elswhere if you dont wanna waste your health...

i dont think its anything to really worry about... just wash the weed in warm water if your that bothered.. the sand will come right off...