in a canadian chemical study, it was discovered it would take 540 pounds of pure THC consumed in 60 seconds to kill a human of average size. now, that's 540 pounds of pure THC, not 540 pounds of marijuana, which usually is only about 1/1000th by mass actual THC. so assuming you're smoking the best stuff on earth, which might be 1/100th by mass THC, you'd need to smoke 54,000 pounds of it in 60 seconds to die. good luck lol.