A sleeping man in Berkshire, England, may very well have burned to death if a neighbor's cat hadn't been aware of the fire that had broken out, detected black smoke, and proceeded to claw at the man's face after climbing through the bungalow's cat-flap. Hugo, the cat, is a hero of feline proportions!
Read the article and see video of Hugo on the BBC News site.
I'm sure Pork Chop would try to save me too in a similar situation—only he'd likely sit on my face, causing me to suffocate to death. But it's the thought that counts.
[Thanks to Narrioch at Torschlusspanik!!]