Gong (Rayman 3)
A gong is an instrument found in the tunnels beneath the Desert of the Knaaren. When hit with a Shock Rocket, the gong makes a sound that imitates a frightened scream of a helpless baby Glute. The Knaaren that dwell in the tunnels are unable to resist this noise and immediately run towards the gong to find the baby and punish it. This gives Rayman a chance to run past the distracted Knaaren and enter the next part of the level.
Surprisingly, Gong Heights from the first Rayman game have no gongs anywhere in sight.