Gotta close by windows real quick so the smell dont get out

you dont die from smoking a lot of weed, there was a dude that smoked like 2 kilos of weed and was basically fine after he came down from it, the only real danger is like, suddenly deciding you have wings and jumping off a building or trying to drive during it or something

That wouldn't kill you. Even if that was all pure hash instead of flower, it's still not enough.
You'd plateau incredibly fast anyway, and smoking more would be pointless, as you're just going to fall asleep.

I was more worried about the asphyxiation caused by combustion of weed in a closed room, as the title states

Still nowhere near enough. A bad cough for the next week? Yeah.. and that assumes you somehow smoke the whole thing without opening a window/door or having the AC on.. or many of the other ways air leaks from a house/apartment.

I didn't know you can't OD on weed. Thanks for teaching me a thing :P

Yep, THC and CBD are far safer than caffeine or even sugar.

well from a strictly OD standpoint they are but neither of the latter will addle your faculties enough to do something fatally stupid nor will they impair your ability to drive