The problem is that you probably won't notice the lack of oxygen. And after 1 minute you would not have enough mental capacity to put the mask on. There are som

The problem is that you probably won't notice the lack of oxygen. And after 1 minute you would not have enough mental capacity to put the mask on. There are some funny hypoxia videos: https://news.ycombinator.com/item?id=24495939 https://news.ycombinator.com/item?id=24495939