your suggesting you can't overdose on weed?
I think if you read up on edibles you'll find its fairly easy to do.. taking the words denotation to heart, we can see it doesnt mean a certain reaction was seen in an individual, rather more than the suggested dose was administered perhaps simply being uncomfortable..
now pot heads will disagree, but thc etc is not completely safe. and no I don't wanna hear any damn conspiracies.. depending on your starting condition an overdose could prove fatal