Flap

The RuneScape Wiki also has an article on: rsw:Flap

Flap
Released		4 July 2006 (Update)
Members		No
Sound		No
Enhancer		Chicken outfit
Duration		0.96 seconds
Requirements		Open the Gift of Peace at the Stronghold of Security.
Animation

Flap is an emote unlocked in the Stronghold of Security. Players must search the Gift of Peace to unlock the emote. Upon use the player flap their arms up and down imitating a chicken.

When a player performs the Flap emote while wearing the Chicken outfit, the player rises upwards while flapping. When players land, they will look at their wings. The Chicken outfit can be received by completing any Easter event.

A player doing the enhanced Flap emote