In the main tomb in the Catacombs, going through the exit triggers a Dahaka chase. On the 2nd and 3rd chases through this exit, you'll come to a branch in the passageway. If you turn left at the branch, there's a weapon rack hiding immediately to your left. Break the rack and you can pick up the Rayman Glove, an unbreakable secondary weapon that does minimal damage, but knocks all regular enemies to the ground with one hit.