Rampage is the 131st episode of the Katekyo Hitman Reborn! anime.
When Hibari starts to open the Hedgehog Box Weapon, the hedgehog starts to act drunk from the amount of Dying Will Flame given to it. After accidentally poking Hibari's hand, the hedgehog becomes mentally shocked and goes out of control. It rapidly starts to grow, endangering all those around it. Meanwhile, Tsuna is heading towards the others when a plant Box Weapon blocks his path. He quickly defeats it.