"Hey Dean, I think I found another way to kill a Wendigo. One that doesn't involve using a blowtorch." Sam said as he set the library book he'd been reading aside...

"How is that supposed to help us kill the Wendigo?" Dean asked two weeks later as he pointed to the cage that Sam was carrying into the mine. It had taken them nearly that long to capture the creature in question.

When the Wendigo made its appearance, Sam released the small animal from the cage. Two seconds later, it got to work, and less than a minute after that, the Wendigo was rolling on the ground writhing in agony, its pained howls reaching near-deafening volumes.

"Sam," Dean said as he watched the spectacle in horrified fascination, unable to turn away much as one would stare at a train wreck.

"Yes Dean?" an equally disturbed Sam replied.

"This never happened."

"Agreed."

&!&

Found in the Wikipedia Article on the Least Weasel: The Chippewa believed that the weasel could kill the dreaded wendigo giant by rushing up its anus.