WoW:MACRO mountspecial

/mountspecial is a slash command causing your mount or druid Flight Form to perform a special stunt, depending on the mount. For ground mounts, this animation can be triggered while standing and pressing the space bar, but for flying mounts, only the slash command can be used. Also, the command can trigger the animation while riding or flying.

List of stunts per mount type (incomplete)

• Horses and Talbuks: rear up
• Kodos: throw the head from side to side with a roar
• Flight Forms: perform a loop

When used unmounted

For the unmounted or shapeshifted player character, this animation is not supported, hence the character will default to a generic stand-still position, even while running. In cat form, this will even cause the cat to leave its crouching position and stand without bent legs.