What @Yeti is referring to is when you get the highest you've ever been, you may feel as if your going to die but in all reality your just super trashed.
Please don't take anyone that says weeds bad for you seriously cause it's all bull shit lies. The research done on cannabis is insane, not ownly does weed help the growth of new brain cells by stimulating growth, cannabis oil/wax has recently been proven to actually kill cancer cells. So please be more informed and learn the facts.
I smoke a bowl every morning, a couple bong rips throughout the day, and usually a joint before I go to bed.