British MPs have a long tradition of yelling whoooooo (see this question).
Are they unique in doing so? Even the Scottish parliament seems more... conventional.
Edit: I've noticed that even at Westminster they only do this during plenary sessions (or whatever they call it when they're in the famous room), not during committee meetings in other rooms.
Edit 2: I'm interested in parliaments where such behaviour is traditional and conventional, not in situations where parliamentarians have recently started fighting but such is not considered acceptable behaviour.