A true story, happened some days ago:

A fox got through a rabbit burrow into a goose enclosure.
The geese reacted unbelievable aggressively, because they were sitting on eggs.
They drove the fox away. But he couldn't find the rabbit burrow to get out of the enclosure.
The fox was so excited that he got an cardiac infarction and died.
The geese got a reward for their courage: They are going to spend christmas alive.