Bull Horn

Hold and release or

The Bull Horn is one of Birdie's special attacks in the Street Fighter Alpha series. Executed by holding down either two or more punch buttons or two or more kick buttons, then releasing them, the attack sees Birdie turn away from his opponent. Depending on how long the buttons were held down, he will then shout "One!", "Two!", "Three!" or "Four!", then turn back and dash towards his opponent. When he reaches them, he will headbutt them the declared number of times.

Because he turns away and shouts before dashing, the attack is fairly telegraphed and easily countered.