How do people who run back into a burning building to save a pet or child survive?

Question

Occasionally I see news stories like “man runs back into burning house and rescues beloved pet”

However, I’ve also been told that you will most likely die in seconds if you inhale the smoke. I’ve read that in a fire you have to crawl to escape. I’ve read that you have to sprint quickly through the flames if you have a chance (the exact opposite of crawling low?).

In: 223

Answer 1

Even more astounding question, how do those still in the building survive?