ok man well what ya do is you save the roaches from the joints you smoke and put them together to make a genaration joint.. then you take the the roches from all of your generation joints youve smoked and put them together to make a grandfatherjoint then you take all of the roaches from a grandfatherjoint and put them together... you get the piont. do this as many times as you can and keep on rolling joints till you have one superfuckingfatass joint and smoke it and get fucked as shit.
I did it, took 2 ounces, smoked it all, came out with a ounce 1/2 of roaches. Smoked it all, came back with 3/4 ounce, smoked it all, left me with 1/4 oz, BLOWEEEED.
I've only ever gotten as far as a 3rd generation joint. (Assuming that it takes 5 roaches to equal one joint, that means it took 25 joints, about a half oz). However, i know this one dude who smoked like maaaaad amounts of herb every day, and one summer he was able to make a 10 generation blunt, he said that he had to relight it each time he took a hit because it was sooo rezed up.