Today's chilling but cheerful tale: the happy ending to a story about being buried alive usually means the victim showing signs of life at a timely moment. I've never heard of a "dead" baby "awakening", though.
It was in Tulancingo, in Mexico:
The funeral ceremony was in full swing, when the present family noticed that sound came out of the box.
The child began to cry during the funeral in his coffin.
(thanks to Arnaud Leene via Twitter; machine translation via Google's all-seeing eye)