Physical impossibility to OD mate. You'd simply have to smoke or eat so much... you couldnt physically do it.

If you can smoke about 1500 full size cone joints within 5 minutes... or eat 10 times your body wieght in 5 minutes, you might OD.

Fact is, no human can do that. No human has EVER died because of cannabis, overdosed, smoked too much....

Cannabis is one of the safest substances man has EVER found.

WATER... that'll kill you, quite easily... [drink too much, bam, water poisoning, good by brain!]

RAW POTATOES.... that'll also kill you quite easily. [eat em raw, you wont be well!]

Cannabis.... couldnt kill you if it was alive and hated you!