The Supreme Court on Wednesday said nobody under 18 years was allowed to participate in human pyramid formation on the occasion of Janmashtami on August 25.The apex court bench headed by Justice Anil R. Dave said the height of the human pyramid should not be more than 20 feet.The bench said this while allowing two directions of the Bombay High Court which were passed in 2014.The decision came as the court gave a clarification on an application by Maharashtra government on this count.