The most exciting revenge ever you heard, a student whose finger got bitten by a piranha, cooked and then ate that piranha.
Actually this story is of Lauren Treacy who was on her 3 month English teaching trip. When she was busy fishing in the Lake Titicaca, she catches almost 10 fishes. One of them was with sharp tooth. She saw this type of creature first time and with excitement she holds that sharp tooth piranha by her hands and in result that piranha bites her up so hardly that she needs a hard vaccination later.
But after this bite, she felt so anger that again she catches more piranhas and ate them all after cooking. She said that it was my anger to that sharp tooth. However she also said that before eating this piranha, she was fully vegetarian but because of her anger she ate that creature.