I am a little bit obsessed with the story of the alligator-swallowing python in Florida. Here's a great pic.
The 13-foot python tried to swallow the 6-foot alligator. From the AP report:
Although the gator may have been injured before the battle began -- wounds were found on it that apparently were not caused by python bites -- Mazzotti thinks it was alive when the battle began. And it may have clawed at the python's stomach as the snake tried to digest it, leading to the snake's demise.

The python was found with the gator's hindquarters protruding from its midsection. Its stomach still surrounded the alligator's head, shoulders and forelimbs. The remains were discovered and photographed Sept. 26 by Michael Barron, a helicopter pilot and wildlife researcher.

Pythons in the Everglades have been a problem for a while now. This story discusses several battles between pythons and alligators, witnessed by various tourists.